ImageTools & initArray

New:
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* Added class `ImageTools`.
* Added Hossam Hassan's improve borders tweak (in `ImageTools`, named `initArray`).

Improvements:
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* Now the right picture box (contains the filtered image) is cleared when mouse clicked.
* Some improvements on the Alpha Trim class and usage: Now you should pass the image matrix only to the constructor, and pass `sortingType` object to `removeNoise` method instead, and the display of the image is now an outer operation.

Notes:
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1.  For some reasons, Hossam's new tweak `initArray` is not running well, and it improves the right and bottom borders only.