Tip ranges
Change buttons slightly (0 => $0, range defaults to $10)
Prevent firing on the range when the target isn't dragging
Increase the range width so we have >99px of movement
Use standard tip UI for ANON; #1056

We had been WET here.
Merge branch 'master' into tip-ranges

Conflicts:
	www/assets/%version/gittip.css
Switch to a background image (fixes Firefox, possibly IE9+)
Flash login link when anon tries to tip; #1055

This is actually broken on master, fixing it here.
iOS support!
Prevent accidental scrolling while dragging the range handle
Merge branch 'tip-ranges'
Bump version to 9.1.8
Bump version to 9.1.8-dev