Cutting build 1.8.2

Update description for full 1.8.1 release.

Merge branch 'master' into massive-merge

Conflicts:
	README.md

Changing nv.dev to equal false.

Rewording the community message on readme

version 1.1.15-beta

version 1.1.15 beta

ran grunt

Added new feature to stackedAreaChart: stack_percent mode.

Minor update to how the new tooltip works. The series is highlighted …

…when your mouse moves near a point.