Comming cmake changes
Updated gitignore based on folder changes
Removed .gitmodules
Added entity death event

An event that can be triggered when an entity dies.
Handling hero death via events

Also got rid of the free event handler stub functions and replaced with
member functions.
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Fixed CMakeLists for Linux builds.erge branch 'cmake'
Merge pull request #65 from zackthehuman/master

Fixed linux build; added event handling for death and weapon use