Merge pull request #1 from mavenik/master

Initial draft
Merge pull request #2 from mavenik/master

Add command files, update alert policy
Merge pull request #3 from mavenik/master

Update warning condition to consider idle passengers
Merge pull request #4 from mavenik/master

Fix typo
Merge branch 'master' of github.com:yournextleap/nrpe-plugins
Add NRPE plugins for Unicorn global queue stats
Renamed check_unicorn
Update perf stats output. Replace semicolon with space for graphios plots
Update perf stats output. Replace semicolon with space for graphios plots