Added support for protoc plugins
match os name using regex
Merge branch 'osregex'
reusing ProtocConfig for Plugins to have platform dependent plugin paths
Merge branch 'plugin'
now matching os names for plugins the right way around
Merge pull request #1 from Ray519/master

now matching os names for plugins the right way around
Merge pull request #10 from jakobwenzel/master

Adding support for protoc plugins