Vector3: Finalizing class rename from Vector2
Removed math namespace.
Vector4: Removing friend functions; no need
Vector4: Global functions now explicitly extern
Vector4: Commentation removed.
Vector3.h: Styling change
Vector3 & Vector4: == operator now const-qualified
Vector3: == operator now uses ScalarCompare
Don't want to ever use == operator between float values. If they're within
a certain epsilon, float values can be deemed equal.
osx_Utility.mm: Init renamed PlatformInit, removed Deinit
Merge branch 'develop'