Merge pull request #330 from goehle/essayslow

Essay Optimization Hotfix
Removed the jsMath files.
Fixed mathview so that it doesn't look janky on small screens.
Cleaned up MathView a little bit. The big changes are

1) It now supports latex editing.  Just add the class latexentryfield to a text area and it will make a button for a mathview latex edior
2) Added this mathview latex editor functionality to PGProblemEditor2/3.  It can be turned on and off by a config variable (which is not in the Course Configuration area)
Restored initWW functionality.  This allows applet problems to work again.
Added the ability for mathview to work with essay answers.
Added an extra check to prevent initWW from being called twice.
making directory clean before attempting button
'working' version of showmeanother
attempt to add showMeAnother to database
fixed line break mistakes
sort of working version of button
added commas to export and import
Merge pull request #338 from goehle/appletfix

Applet Problem Fix
Merge pull request #334 from goehle/appletfix

Applet Problem Hotfix
before hunting for more max_attempts
added showMeAnother to defaults.config
open in new tab
removed redundant check of empty showMeAnother
new tab trickery: showMeAnother opens in a new tab, and the other buttons don't; I made
use of _blank and _self. Note that I had to add these extra attributes to the other
buttons