Removed collada support from the encoder

- The gameplay-encoder can no longer convert collada (dae) files.
- Updated the precompiled gameplay-encoder binary for windows and mac. (linux will have to be updated later)
- The Visual Studio and Xcode projects have been updated to link against the FBX SDK in the default installation location.
- The collada dom external dependencies will be removed later
- The dae files will be removed later