Proto commits in aternosorg/php-etcd

These 3 commits are when the Protocol Buffers files have changed:

Commit:e1d99d7
Author:Julian Vennen

Move generated classes to their own namespace

The documentation is generated from this commit.

Commit:7706bd2
Author:Matthias Neid

added source and modification comments to proto files

Commit:3e85b56
Author:Matthias Neid

initial commit