Adjust datepicker to display current field date

When datepicker is toggled on, set the date in the input field as 'currently selected' if it's within min/max range. #1476
Merge pull request #2097 from pjackson28/v3.0

Tweaked project mega menu navigation
Merge pull request #2099 from pjackson28/v3.0

Fixed legend overflow issue in #2076 with the fix proposed by @patheard
Merge pull request #2101 from pjackson28/v3.0

Changed fix in #2099 to box-sizing Compass mixin
Push slideout below h1 and sign-in/sign-out button
[slideout] convert spaces to tabs
Icons: Fix external link class specificity

- Header and footer external links exhibit the same behaviour as before
without the increased specificity on the body
- The 20px right padding is left for now
Iconds: Add additional comments
Icons: Update external link comments
Icons: Better specificity on rel external padding
Fix ajax menu link
Fix ajax menu link
Merge pull request #2109 from jeresiv/demos

Demos
Fixed Share widget hint spacing issues (#2108) and RTL issues.
Merge pull request #2111 from pjackson28/master

Fixed Share widget hint spacing issues (#2108) and RTL issues
Merge pull request #2107 from berubs/issue1998

Push slideout below h1 and sign-in/sign-out button
Changed tab top margin from pixels to ems to take into account text scaling.
Merge pull request #2112 from pjackson28/master

Changed tab top margin from pixels to ems to take into account text scaling (for #2107)
Fixed Footnotes RTL support.
Merge pull request #2113 from pjackson28/master

Fixed Footnotes RTL support