Reduce usage of ng-show/hide to reduce number of useless DOM elements (fixed)

Progress in the direction of #87, especially on mobile.
This version doesn't break everything for new users.
Revert "use ng-if to hide date instead of css"

That actually decreases performance, because it adds a watcher to every line

This reverts commit 16365db5889eda5c7c508b3c67ea540338ffae1f.
Revert the revertion of multiline and clean it up for new directive.
Merge pull request #270 from glowing-bear/performance3

Performance improvements (fixed)
Merge pull request #271 from torhve/multiline

Revert the revertion of multiline and clean it up for new directive.
Bump versions
Merge pull request #272 from torhve/versionbump

Bump angular and underscore.js versions
Better countWatchers

The old one missed a few, two on the input and the one in the title.
This version also doesn't use jQuery

From: http://stackoverflow.com/a/18539624 by StackOverflow user "plantian"
Remove unnecessary uses of jQuery and dead code

Native code is faster anyways ;)
Remove old cruft
Improve CSS layout. Fix 98% bug that affects chrome/ff differently.

Conflicts:
	css/glowingbear.css
Pixel adjustments to attempt perfectly align icons in top bar
css: merge body tags
Merge pull request #275 from glowing-bear/countWatchers

Better countWatchers, remove jQuery uses
Add space to bottom of bufferlines
Merge pull request #278 from glowing-bear/uifix

Add space to bottom of #bufferlines
Travis: disable build success IRC notifications
Merge pull request #281 from glowing-bear/travisbequiet

Travis: disable build success IRC notifications
Support clearing of buffer lines with command /c or /clear