Units - initial commit
[Minor] Improve comments about urlData
[Fix] Change test for editable element to check an input element's 'type' property instead of attribute
[Refactor] Change the term "Unit" within an identifier name to "CU" (short for Container Unit)

The term "Unit" will now more generally be used to include other types of units as well, like hyperlinks, etc.
This is in keeping with the more significant refactoring that will take place next.
[Fix] Enable toggle shortcut to toggle extension on from off state
[Fix] Add missing CUSpecifier to the  urlData for news.ycombinator.com
[Feature] Better fitting CU overlay for sites like Reddit, Hacker News
Add option 'useInnerElementsToGetOverlaySize' and related code to allow specific sites' overlays to have their sizes determined based on the
innermost leaf child elements of the CU (instead of the outmost child elements, which is the default.)
[Cosmetic] Change stackoverflow.com overlay padding
[Refactor] Rename 'swiftly' to 'UnitsProj'
[Fix] Fix issue causing repeated quick invocations of selectPrev() to be slower compared to selectNext() + some JSHint fixes
[Data] Add support for StackExchange sites
[Minor] Improve comments about previous commit
[Data] Add URL data for MathOverflow (uses StackExchange software)
[Fix] Fix some JSHint warnings
Merge branch 'master' of https://github.com/MakeBetter/Units
[Minor] Rename the function $CUIsInvisible to isCUInvisible
[Fix] Fix JSHint errors
[JSHint] Add .jshintrc and .jsignore files
[Refactor] Rename file urlData.js to unitsData.js, rename variable urlToUrlDataMap to unitsData
[Fix] Fix issue introduced by previous commit