Update bug fixes/enhancements

Author: danschultzer

CHANGELOG.md

@@ -12,6 +12,7 @@
 - @danschultzer updated node-pre-gyp to fix load of node-opencv in electron runtime.
 - @andreasgal made `matrix.getData` work with RGB images.
 - @Evilcat325 added `matrix.MatchTemplateByMatrix` method.
+- @danschultzer added code coverage.
 
 # Bug fixes
 - @dominikdolancic fixed image load issue in `matrix.matchTemplate()`.
@@ -20,6 +21,7 @@
 - @mcwhittemore fixed dissimilarity example image load.
 - @saoron fixed dead index.html documentup source.
 - @andreasgal fixed an issue with `matrix.crop` (and potentially others), where `matrix.getData` ends up returning less than full matrix.
+- @danschultzer fixed `examples/test.js` channel issue, and problematic Vec3b casting (instead of Vec3f) in `matrix.set`.
 
 ## Backwards incompatible changes
 - @dxprog changed readImage to load image with `CV_LOAD_IMAGE_UNCHANGED` instead of `CV_LOAD_IMAGE_COLOR`. The latter returned the image as 3-channel.