Merge pull request #45 from eyakubovich/master

docs: document UDP port used
Merge pull request #46 from eyakubovich/master

docs: document udp and alloc backends and their configuration values
Use ModifiedIndex and not EtcdIndex for watches

When watch returns, it's ModifiedIndex that contains
the index of the returned event. So it's incremented value
should be used on next watch.

Fixes #48
added files for containerizing and publishing flannel