Merge pull request #280 from hintjens/master

Switch to using zproject.gsl
Merge pull request #281 from hintjens/master

Tracking zproto changes
Merge pull request #282 from hintjens/master

Problem: creating pipe by hand is fragile
Problem: Project structure out-of-date with latest zproject
Solution: Regenerate with latest zproject
Merge pull request #283 from jemc/master

Problem: Project structure out-of-date with latest zproject
Fix issue #284
Merge pull request #285 from mditzel/master

Fix issue #284
Problem: README does not show current build status
Merge pull request #287 from c-rack/master

Problem: README does not show current build status
Problem: Build system out of date with zproject
Solution: Regenerate with latest zproject
Merge pull request #289 from jemc/master

Problem: Build system out of date with zproject
Problem: Using deprecated czmq zbeacon_v2
Solution: Use czmq v3 API actor-based zbeacon

--HG--
extra : amend_source : 03017e72c9dd39452ffe27ec7c95fa949dbf1f2e
Merge pull request #291 from jemc/master

Problem: Using deprecated czmq zbeacon_v2
Problem: Using deprecated czmq zsocket
Solution: Replace usages with zsock
Merge pull request #292 from jemc/master

Problem: Using deprecated czmq zsocket
Problem: Under autotools, *.so is not linking correctly
Solution: Regenerate with fixed zproject

--HG--
extra : amend_source : 6532f89ba6cdc0f174fc27cc2a93787f22050969
Merge pull request #293 from jemc/master

Problem: Under autotools, *.so is not linking correctly
Problem: zyr_stop does not wait for signal

Solution: make it wait properly.