Merge pull request #2 from grahams/master

shorturlhelper
UrlSnarfer: check for None return from helper.fetch

The commit to return dictionaries introduced a bug where None returns
from helper.fetch were still being returned but going unchecked in callers.
UrlSnarfer: unescape HTML characters in descriptions
admin: Update restart.sh post-move
admin: use /usr/bin/env python for interpreter everywhere
admin: handle update to python 2.7

'with' keyword is now reserved and there was something up with
superclass constructors having changed
UrlSnarfer: update twitter helper to handle photo URLs
UrlSnarfer: add $ to denote spoilers in links
VishnuBrowser: add proxy support
UrlSnarfer: add ability to specify username in test mode
Merge branch 'master' of https://github.com/jeffmahoney/vishnu