plugin: sys_time: Debug result.

Issue #156.
plugin: sys_time: Add time syncronization diag.

Issue #156.
plugin: sys_time: Set right suffixes to uint64_t constants.

Issue #156.
mavconn #161: Move library to its own package

Also rosconsole replaced by console_bridge, so now library can be used
without ros infrastructure.
mavconn #161: Fix mavros build.
mavconn #161: Fix headers used in mavros. Add readme.
mavconn #161: Move mavconn tests.
Merge branch 'master' into coverity_scan

* master:
  mavconn #161: Move mavconn tests.
  mavconn #161: Fix headers used in mavros. Add readme.
  mavconn #161: Fix mavros build.
  mavconn #161: Move library to its own package
  plugin: sys_time: Set right suffixes to uint64_t constants.
  plugin: sys_time: Add time syncronization diag.
  plugin: sys_time: Debug result.