Add support for Riemann TCP transport
Merge branch 'master' into feature/gmetad-riemann-tcp-squashed
Merge remote-tracking branch 'upstream/master' into feature/gmetad-riemann-tcp-squashed

Conflicts:
	gmetad/Makefile.am
	gmetad/export_helpers.c
increment riemann counters by no. metrics in message
Bug fixes:
1) Fix memory leak when metric expires. The metadata metric is deleted
properly, but the value metric is not.
2) Memory leak because global_context is not destroyed before reloading
config.
3) Fix errornous handling of zip content.
Add SIGTERM to signal handler
Fall back to searching for protobuff the hard way

It seems Debian fails to ship the pkgconfig file.  Sad.
fix merge conflicts
change some errors to debug output
dont include gm_scoreboard.h as gmetad SOURCE
Merge pull request #134 from satterly/feature/gmetad-riemann-tcp-squashed

Add Riemann TCP transport support
Fix merge conflict
Merge pull request #136 from keyurdg/master

Bug fixes
Update for v3.7.0