Fixed compilation error on OSX 10.10 https://code.google.com/p/protobuf/issues/detail?can=2&start=0&num=100&q=&colspec=ID%20Type%20Status%20Priority%20FixedIn%20Owner%20Summary&groupby=&sort=&id=455
Error and warnings fixes
Added podspec
Added import to pods pch
Fixed version
Exclude Main.m with tests from pod
Fixed podspec bug
Formatted podspec
Merge pull request #4 from k06a/master

Fixed compilation error on OSX 10.10