Switch to using zproject.gsl
Merge pull request #280 from hintjens/master

Switch to using zproject.gsl
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
Problem: creating pipe by hand is fragile

I'm not sure the HWMs are set properly, and they're certainly not
using the zsys environment as they should be.

Solution: use zsys_create_pipe (). Note, this depends on CZMQ PR
being merged.
Merge pull request #282 from hintjens/master

Problem: creating pipe by hand is fragile