configure kdiff tree

configure kdiff tree

#from http://stackoverflow.com/questions/6412516/configuring-diff-tool-with-gitconfig

[difftool "kdiff3"]
    path = C:/Progra~1/KDiff3/kdiff3.exe
    trustExitCode = false  
[difftool]
    prompt = false 
[diff]
    tool = kdiff3 
[mergetool "kdiff3"]
    path = C:/Progra~1/KDiff3/kdiff3.exe
    trustExitCode = false 
[mergetool]
    keepBackup = false 
[merge]
    tool = kdiff3