Added checkstyle plugin to the maven build
Removed System.out from the code
Removed printstacktraces from the code
Added package-info classes
Created mocks for MySQL e PGSQL plugins
Added a log object inside the PluginBase class to simplify logging
inside plugins.
removed unfinished plugin
Merge branch 'master' of http://github.com/ziccardi/jnrpe-lib
fixed some warn/crit param documentation