diff --git a/Makefile b/Makefile
index 4a6a79a..e44ea87 100644
--- a/Makefile
+++ b/Makefile
@@ -3,12 +3,14 @@ VERSION  = dev_$(shell date +%F_%T)
 GOCMD    = go
 LDFLAGS := "$(LDFLAGS) -X 'main.Version=$(VERSION)'"
 GOBUILD  = $(GOCMD) build -ldflags=$(LDFLAGS)
-SRCMAIN  = .
+SRCMAIN  = ./cmd/$(NAME)
 BINDIR   = bin
 BIN      = $(BINDIR)/$(NAME)
+README   = ./doc/README
+LICENSE  = LICENSE
 PREFIX   = /usr
 
-.PHONY: all prep build check-build freebsd-386 darwin-386 linux-386 windows-386 freebsd-amd64 darwin-amd64 linux-amd64 windows-amd64 compile install check-install uninstall clean
+.PHONY: all prep build doc check-build freebsd-386 darwin-386 linux-386 windows-386 freebsd-amd64 darwin-amd64 linux-amd64 windows-amd64 compile install check-install uninstall clean
 
 all: build
 
@@ -18,6 +20,10 @@ prep: clean
 	
 build: prep
 	$(GOBUILD) -o $(BIN) $(SRCMAIN)
+	
+doc: check-build
+	test -d ./doc || mkdir ./doc
+	$(BIN) --help > ./doc/README
 
 check-build:
 	test -e $(BIN)
@@ -48,15 +54,25 @@ windows-amd64: prep
 
 compile: freebsd-386 darwin-386 linux-386 windows-386 freebsd-amd64 darwin-amd64 linux-amd64 windows-amd64
 	
-install: check-build
-	install -m 755 -d         $(PREFIX)/bin/
-	install -m 755 $(BIN)     $(PREFIX)/bin/
+install: check-build doc
+	install -m 755 -d                                        $(PREFIX)/bin/
+	install -m 755 $(BIN)                                    $(PREFIX)/bin/
+	install -m 755 -d                                        $(PREFIX)/share/licenses/$(NAME)/
+	install -m 644 $(LICENSE)                                $(PREFIX)/share/licenses/$(NAME)/
+	install -m 755 -d                                        $(PREFIX)/share/licenses/$(NAME)/go-perceptualhash
+	install -m 644 ./third_party/go-perceptualhash/LICENSE   $(PREFIX)/share/licenses/$(NAME)/go-perceptualhash
+	install -m 755 -d                                        $(PREFIX)/share/doc/$(NAME)/
+	install -m 644 $(README)                                 $(PREFIX)/share/doc/$(NAME)/
 
 check-install:
-	test -e $(PREFIX)/bin/$(NAME)
+	test -e $(PREFIX)/bin/$(NAME) || \
+	test -d $(PREFIX)/share/licenses/$(NAME) || \
+	test -d $(PREFIX)/share/doc/$(NAME)
 
 uninstall: check-install
 	rm -f  $(PREFIX)/bin/$(NAME)
+	rm -rf $(PREFIX)/share/licenses/$(NAME)
+	rm -rf $(PREFIX)/share/doc/$(NAME)
 
 clean:
 	rm -rf $(BINDIR)
diff --git a/args.go b/cmd/range-gen/args.go
similarity index 98%
rename from args.go
rename to cmd/range-gen/args.go
index 529f5da..a564a10 100644
--- a/args.go
+++ b/cmd/range-gen/args.go
@@ -3,7 +3,7 @@ package main
 import (
 	"github.com/juju/gnuflag"
 
-	"range-gen/output"
+	"range-gen/internal/output"
 
 	"errors"
 	"os"
diff --git a/main.go b/cmd/range-gen/main.go
similarity index 99%
rename from main.go
rename to cmd/range-gen/main.go
index 905d765..a7b0cfc 100644
--- a/main.go
+++ b/cmd/range-gen/main.go
@@ -18,7 +18,7 @@ import (
 
 	"github.com/dsoprea/go-perceptualhash"
 
-	"range-gen/output"
+	"range-gen/internal/output"
 )
 
 const (
diff --git a/doc/README b/doc/README
new file mode 100644
index 0000000..d8bf017
--- /dev/null
+++ b/doc/README
@@ -0,0 +1,12 @@
+Сreates a list of scene ranges based on a set of frames from the video
+
+Usage: range-gen [option]... <input_dir> <output_file> <threshold>
+input_dir          Directory with png images
+output_file        Range list file
+threshold          Image similarity threshold (0-1024)
+
+Options:
+  -j, --jobs N     Allow N jobs at once
+  -n, --noise      Default noise level for each range
+  -h, --help       Show this page
+  -v, --version    Show version
diff --git a/output/output.go b/internal/output/output.go
similarity index 100%
rename from output/output.go
rename to internal/output/output.go
diff --git a/third_party/go-perceptualhash/LICENSE b/third_party/go-perceptualhash/LICENSE
new file mode 100644
index 0000000..ca609a1
--- /dev/null
+++ b/third_party/go-perceptualhash/LICENSE
@@ -0,0 +1,26 @@
+BSD 3-Clause License
+
+Copyright (c) 2018, Dustin Oprea
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the <organization> nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.