Fixed physics rotations#105

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simoarpe wants to merge 4 commits intoUnderwaterApps:masterfrom

simoarpe:fixed_physics_rotations

Commits on Jul 14, 2016

Edge class with better equals and hashcode implementation
simoarpe
committed

Commits on Jul 15, 2016

set default friction and restitution to 0
simoarpe
committed

Commits on Jul 18, 2016

fixed bug: composite light does not follow the composite item
simoarpe
committed

Commits on Jul 31, 2016

fixed physics rotations (again)
simoarpe
committed