Support protobuf ("Google Protocol Buffers") …

2.5.0 is the latest version.
2.4.0a is required by Hadoop-2.0.0-cdh4.5.0.
minor style fixes in protobuf easyconfigs
Merge pull request #1 from boegel/protobuf

minor style fixes in protobuf easyconfigs
Merge pull request #680 from ehiggs/protobuf

Support protobuf ("Google Protocol Buffers")