GPII-179: Fixed styling issues with IE8 caused by the fact that IE8 doesn't support html5 tags.
GPII-179: Fixed the IE8 image scaling issue.
GPII-179: Added in PNG fall back to solve the problem that SVGs are not showed in IE8.
Merge branch 'master' into GPII-179 and resolve conflicts.

Conflicts:
	demos/discoveryTool/index.html
GPII-203: fixed stacking issue.

Moved the discovery tool panel higher in the stacking order so that it will be above the more text elements.
Merge branch 'master' into GPII-203
Merge branch 'master' into GPII-203
GPII-207:
- Search and prev/next inputs now appear inverted. - Low contrast links are no longer bold.
- Blur on drop shadows are gone in contrast modes.
- Low contrast now uses RobotoSlab-regular for the content area.
GPII-207: Removed the drop shadow from the header.
Merge remote-tracking branch 'jon/GPII-207'

* jon/GPII-207:
  GPII-207: Removed the drop shadow from the header.
  GPII-207: - Search and prev/next inputs now appear inverted. - Low contrast links are no longer bold. - Blur on drop shadows are gone in contrast modes. - Low contrast now uses RobotoSlab-regular for the content area.
Merge branch 'master' into GPII-203

Conflicts:
	demos/discoveryTool/demo.css
Merge remote-tracking branch 'cindyli/GPII-179'

* cindyli/GPII-179:
  GPII-179: Added in PNG fall back to solve the problem that SVGs are not showed in IE8.
  GPII-179: Fixed the IE8 image scaling issue.
  GPII-179: Fixed styling issues with IE8 caused by the fact that IE8 doesn't support html5 tags.
Merge remote-tracking branch 'jobara/GPII-203'

* jobara/GPII-203:
  GPII-203: fixed stacking issue.
GPII-202: removed the animation from hide and show
Removed the animation from hide and show for the displaying and removing the discoverIcon. This was done by setting the duration to 0.
Merge branch 'master' into GPII-202
Merge remote-tracking branch 'jobara/GPII-202'

* jobara/GPII-202:
  GPII-202: removed the animation from hide and show Removed the animation from hide and show for the displaying and removing the discoverIcon. This was done by setting the duration to 0.