Some initial work on revising appearence.
Add the 'changeiconcolor.js' utility.
Add mechanism for exporting color definitions from stylus files and
automatically changing icon colors to match CSS
First step in redoing icons using new coloring system.
Tweak lock icon.
Update plus icon to use new icon coloring method.
Remove now-undeeded background-color def in heavyLayout.styl
Update 'back' and 'home' icons for new icon coloring method.
More css changes.
More css fixes.
Add svg images.
Merge branch 'master' into newlook
Merge branch 'master' into newlook
Remove now-unneeded debugging PID display
Update comment in setenv.sh
Minor CSS/JS tweaking in userhome page.
More changes to userhome
More UI tweaking