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STUD-1071
a11y: manage focus appropriately for modals with iframes in IE (LMS-1539)
update rewriteStaticLinks utility function(modifiy only relative urls)
STUD-674
fix tinymce popup size too small
STUD-674
add validation for grading types (allow only integers)
STUD-988
The function tzAbbr() causes null-reference exception when the browse returns a non-English timezone string.
Add 'Yihua Lou <supermouselyh@hotmail.com>' to the AUTHORS file.
Very Minor tweaks to the LMS and CMS startup.

I was going to do something in the startup code, then changed my mind,
but didn't want to just discard these changes.
prevent failure when module does not have a data field
Studio: adds in developer-centric Sass file
* provides new .scss file for developers to add temporary/in-progress Sass for further refactor/polish
* cleans up note/import order in shame and application Sass files
LMS: adds in developer-centric Sass file
* provides new .scss file for developers to add temporary/in-progress Sass for further refactor/polish
* cleans up note/import order in all application scss files