Protobuf 2.5.0 - Installation

Note: solution for 'Cannot run program "protoc"'

- cd
- wget http://protobuf.googlecode.com/files/protobuf-2.5.0.tar.gz
- tar xzf protobuf-2.5.0.tar.gz
- cd protobuf-2.5.0
- ./configure
- make
- sudo make install
- sudo ldconfig