Merge pull request #76 from TotteKarlsson/more_on_distro

More on distro
Updated the plugin installer
Merge pull request #77 from TotteKarlsson/more_on_distro

Still possibly to make parameters easier to deal with
fix to build pydocs
Refactoring: PluginCallbackFnc PluginEvent
Changed name of assignments of events
Changed callbacks to events
Changed pluginCAllCabk to PluginEvent
Merge branch 'develop' of https://github.com/AndySomogyi/roadrunner into more_on_distro
Added a two plugins example
Changed Callback To Event
Renamed examples and simplified them a little
Added a two plugins demo