byte and short array upgrade -- full compatibility with Java for all operations

GLPL

JSGraphics2D, swingjs2.js update

JSGraphics2D

Merge pull request #22 from BobHanson/yadav1

parent UI not tainted when child added

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// BH 7/21/2018 fix for static{thisApplet.__Info.width=300} not working

// BH 7/21/2018 fix for static{thisApplet.__Info.width=300} not working

Cause
=====

In Java2ScriptCompiler the literals ".J2S" and ".j2s" are used as names
for the J2S compiler options file (the "dot-j2s" file). The literals
only differ in the case of the letters.

On Windows both literals ".J2S" and ".j2s" denote the same file. However
on other operating systems (like Linux and macOS) the two literals (can)
identify two different files. This is because these operating
system have (or can have) case-sensitive file systems.

As a consequence adding a file ".j2s" (with lower case letters) to a
project will not activate the J2S compiler on Linux and macOS because
the compiler's "isActive" method checks for the file ".J2S" (with upper
case letters) and does not find such a file.

Solution
========

Always use one unique name for the J2S compiler options file (".j2s"),
accessible through constant `Java2ScriptCompiler.J2S_OPTIONS_FILE_NAME`.

Also
====
- fix "unused import" warnings in Java2ScriptCompiler.java

Bug: J2S compiler not activated on Linux/macOS (Wrong ".J2S" file name)

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