Merge pull request thelinuxlich#58 from Maximusya/master

Removed ComponentType properties with side-effects

Fix unit tests

Adding method to SystemManager

Adding GetSystems and changing GetSystem

Fixing Issue thelinuxlich#39

Stable Version Released

Fixing GetEntityByUniqueID parameter

Fixing Issue thelinuxlich#36

Fixing GetEntityByUniqueID parameter

Fixing Issue thelinuxlich#36

Stable version 1.2 Released

Stable version 1.1.0 Released

Stable Version