protobuf dependency version changed from 2.4.1 to 2.5.0
protobuf dependency version changed from 2.4.1 to 2.5.0 - commit fix
protobuf 2.5 instalation script for Travis
protobuf 2.5 instalation script for Travis - build fix
protobuf 2.5 instalation script for Travis - pushd/popd
protobuf 2.5 instalation script for Travis - fix
protobuf 2.5 instalation script for Travis - remove make check
Merge pull request #336 from lukasnalezenec/protobuf

protobuf dependency version changed from 2.4.1 to 2.5.0