Problem: lagging latest zproject changes

Will this madness never end? :-)

Solution: regenerate project files.
Problem: zproto changed its public API

Solution: refer to zproto_codec_c_v1 so that the existing code isn't
broken. This can be modified over time.

Also, add the zre_msg model to project.xml so we can use 'make code'.
Minor cleanup to .gitignore
Merge pull request #281 from hintjens/master

Tracking zproto changes