Update readme

README.md

 # tubus
 ### command-line interface for video hosting services.
 
-#### !! Note: This program is broken in many places and will not be fixed in the future !!
+#### Note: This program is broken in many places and will not be fixed in the future!
 
 Tubus is currently a proof of concept command-line interface for youtube.
-Many functions will be redone.
 
 ### Installation
 ```
 mkdir -p ~/go/src ~/go/pkg ~/go/bin
-GOPATH="~/go" go get gitlab.cs.fau.de/since/tubus
+GOPATH="$HOME/go" go get gitlab.cs.fau.de/since/tubus
 ```
 
 The source files will be fetched and automatically compiled.