Fix a sentance that was
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=47623751
Update matrix definition to allow for optional parameters to translate, scale, rotate, and rotateAxisAngle methods and correctly reflect optional return of inverse if the matrix is non-invertable.
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=47625336