Worked on GUI part of adding option to Pref window
Add 'link' between pref window and file for presnt

Sets present.bgcolor on clicking OK, sets color in Preferences window from
Preferences.txt on opening the window.
Changes as to how the user selects Present bckgrnd

Clicking on the color preview brings up a color selector; Inputting a hex color automatically previews it
Shed a lot of weight, some UI changes

Rm CustomColorChooser, add Cancel to ColorChooser,
Formatting changes,
Removed unnecessary listener,
Inerchange preview color and text field.
Done adding Present bckgrnd color to Prefs window

Cursor to hand on mouseover & new border for color preview
Fixes Issue #2534 by setting the Application name for Linux
Line coloring is now proper for filtered contribs

Both when comboBox and filterFields are used
Props file no longer overwritten with contribs.txt

Unless something isn't right, in which case only that field is overwritten
in properties
Stage 1 complete: at least update manager opens
Update Manager now displays on startup of Processing
Remove writer

Seems writer is not used in Runner#generateTrace.
Filling in missing alpha for blending operations

Fixes  #2012, fixes #2275. It's the same problem as #2030 - Java won't
set the high bits when RGB, returns 0 for alpha in
BlendingContext#compose(Raster, Raster, WritableRaster)
use 7u65 for OS X builds
more bug fixes
Merge pull request #2645 from JakubValtar/blend-fix

Fixes blending operations in Java2D
Merge pull request #2608 from joelmoniz/fixContribProp

Properties file no longer overwritten with contributions.txt values unless something in the properties is amiss
Merge pull request #2636 from joelmoniz/updateOnStartup

Update Manager now shows on startup (resolves #2557)
Merge pull request #2598 from joelmoniz/correctContribColor

Line coloring is now proper for filtered contributions (both when comboBox and filterFields are used for filtering)
Merge pull request #2568 from joelmoniz/presentBckColor

Added Present's background color as an option to the Preferences window.
fix for serial library exports on Windows