node: get rid of unused is_valid() method
Merge branch 'master' of github.com:reverbrain/elliptics
Merge pull request #393 from shaitan/master

Build: fixed build on rhels - made elliptics_monitor shared library
Merge pull request #394 from shaitan/master

Tests and Monitor (Master)
Merge branch 'master' of github.com:reverbrain/elliptics