Timer should set the ownerId of events. Without it some tests breaks.
Added a logger to base system.
Make ActionCommandEvent not emutable so we can create it in a json stage
spec file
a created bomb has a draw component
Including BombSystem + ExplosionSystem test case. 
Including test for a BUG when two explosions happens together
Including all Systems in the GameMatch
Protecting timeSystem from a nullpointer when the timer has no effect.
Creating enpty constructors so a instance can be create by json reader
in libgdx
Fix #53 - Components was not persisted in the entityManager
Another fix in TimeSystem receiving empty events.
Merge pull request #6 from gabrielsr/master

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