update Less.js to 1.7.3
Add testForMemcachedServer function

This just creates a TCP socket and trys to connect to the specified
port. if it fails we send a message to the node.js console.

This closes #1566
Update library list to include MooTools version 1.5.0, removing latest also since it was pointing to the ancient 1.12
Merge pull request #1642 from kentaromiura/updating-mootools-version

Update library list to include MooTools version 1.5.0, removing latest a...
Merge pull request #1640 from jsbin/fix/memcached-error-1566

Add testForMemcachedServer function
Merge pull request #1609 from mmis1000/update-less-1.7.3

Update Less.js 1.4.2 -> 1.7.3
undefsafe that bad boy.

Fixes #1643
Merge pull request #1644 from jsbin/fix/1643

Don't blow up when configs don't exist
Updated stylus
accountslists.js not working yet
Merge branch 'master' of https://github.com/jsbin/jsbin
Merge branch 'master' of https://github.com/abe-winter/jsbin

Conflicts:
	public/js/render/saved-history-preview.js