Updated Specfile
Updated envirment variable name

Added a new envirment variable called ChocolateyBinRoot that is used in newer chocolaty versions but leaved the old for backward compatiblity!
Hotfix Chocolatey Always needs Absolut Path

Chocolatey Always needs Absolut Path else it comes to mix ups with Cygwin MySysGit and so on with Posix support you can sometimes use /bin or bin but C:\bin always works!
Merge pull request #42 from DSPEED/BinRoot-v0.02

Bin root v0.02