Added: GrayoutFilter.java, InvertAlphaFilter.java, MaskBlueFilter.java, MaskGreenFilter.java, MaskRedFilter.java, MaskRedAndBlueFilter.java, NegativeFilter.java
Merge pull request #4 from nhuseinovic/filter-feature

Added: GrayoutFilter.java, InvertAlphaFilter.java, MaskBlueFilter.java, ...