updated pom, optimized code for java 11

pom.xml

src/main/java/plugins/adufour/filtering/Convolution.java

src/main/java/plugins/adufour/filtering/Convolution1D.java

src/main/java/plugins/adufour/filtering/ConvolutionCL.java

.../java/plugins/adufour/filtering/ConvolutionException.java

src/main/java/plugins/adufour/filtering/Filter.java

src/main/java/plugins/adufour/filtering/FilterToolbox.java

src/main/java/plugins/adufour/filtering/GaussianFilter.java

src/main/java/plugins/adufour/filtering/IKernel.java

src/main/java/plugins/adufour/filtering/Kernels1D.java

src/main/java/plugins/adufour/filtering/Kernels2D.java

src/main/java/plugins/adufour/filtering/LocalMax.java

src/main/java/plugins/adufour/filtering/Max.java

src/main/java/plugins/adufour/filtering/Mean.java

src/main/java/plugins/adufour/filtering/Median.java

src/main/java/plugins/adufour/filtering/RemoveOutliers.java

src/main/java/plugins/adufour/filtering/SelectionFilter.java

.../java/plugins/adufour/filtering/SelectionFilterBlock.java

...ain/java/plugins/adufour/filtering/StandardDeviation.java

src/main/java/plugins/adufour/filtering/Variance.java