Merge pull request #3387 from pjackson28/v3.0

Updated home page and readme for v3.1.6 release.
Session: revert to displaying time that session expires
Merge pull request #3439 from patheard/session-timeout

Session: revert to displaying time that session expires
Reverted the pseudostreaming functionality form the Flash fallback
Merge pull request #3479 from LaurentGoderre/fix-2940-2967

Reverted the pseudostreaming functionality form the Flash fallback
Slider: removed window.console call
Slider: fix slider width in Chrome

Setting `box-sizing: border-box;` fixes the the
input[type="range"] width.
Merge pull request #3557 from patheard/slider

Slider: fixes IE javascript error and Chrome width
Tabs: fix IE8 .tabs-roller in .tabs-style-2 (fixes #3695)

Removed the opacity filter from the .tabs-style-2 .tabs element.  IE8
is unable to properly stack a parent and child element that both have
a filter applied.

Modern browsers that understand the opacity CSS rule will still get the
0.95 opacity.
Merge pull request #3709 from patheard/tab-overlay-ie8

Tabs: fix IE8 .tabs-roller in .tabs-style-2 (fixes #3695)
Grids IE8 SCSS: Fixed left padding issue in dual icon scenarios (in which only external icons will appear).
Fixes gh-3285.
Demos: Fixed various broken links.
Merge pull request #3892 from EricDunsworth/v3.0-broken-link-fixes

Demos: Fixed various broken links.
Gitignore: Added sprite naming patterns from v4.0's version of this file.
Prevents generated sprite files from appearing as unversioned in non-v4.0 branches.
Merge pull request #3894 from EricDunsworth/v3.0-gitignore-sprite

Gitignore: Added sprite naming patterns from v4.0's version of this file.
Merge pull request #3890 from EricDunsworth/v3.0-grids-icon-combos-ie8

Grids IE8 SCSS: Fixed left padding issue in dual icon scenarios (in whic...
Datepicker: Tweak date format <abbr>

To improve screen reader user experience
Merge pull request #3965 from berubs/v3.0

Datepicker: Tweak date format <abbr>
Forms: Fix legend font sizing

Fixes gh-2266
Closes gh-3985
Datepicker: Removes abbr from toggle icon alt