Refactor tooltip to separate class.
shift+mousewheel to horiz scroll

Converts shift+mousewheel to horizontal scroll.
This is in accordance with Chrome which supports this shortcut on webpages and textareas.
Use shim blob with importScripts to use CORS for Worker
Add Vim keybinding unit test [Issue 1762]
Merge pull request #1707 from danyaPostfactum/refactor/tooltip

Refactor tooltip to separate class.
Merge pull request #1764 from rgallion/Issue_1762_Add_Vim_unit_tests

Add Vim keybinding unit test [Issue 1762]
Merge pull request #1760 from adamjimenez/patch-21

shift+mousewheel to horiz scroll
cleanup
Merge pull request #1761 from hartman:cors_worker

Use shim blob with importScripts to use CORS for Worker