Review of the effects docs.
Docs: Fixes for images in effects.txt.
Jack2: Fix Possible Segfault

Jack2 resulted in somewhat less available stack space compared to jack1.
This resulted in a possible segfault when initializing padsynth parameters due
to a stack overflow after an VLA creation.
Bank: Fix Patch Deletion Bug

Fixed invalid upper bound.
Thanks to Christopher Oliver for spotting the bug.
UI: Add Mousewheel support

Add mouse wheel support for knobs and sliders.
Adapted from a patch by Christopher Oliver
Update Desktop Files

Remove Depricated Category In Desktop Files
See: http://sourceforge.net/p/zynaddsubfx/bugs/49/
Add examples to list of installed files
OSS: Add Environmental Variable Selection of DEV

The DSP_DEVICE environmental variable now overloads the user
configured preference for the OSS output file.