Support both Python3 and Python2

[imnotjames]

This uses a bit of the python future tool, along with hand-editing to get skybot to run on both Python2.7 as well as Python3.

• strings are unicode by default
• print is now a function rather than a language construct
• Queue is now queue
• the U flag for open is deprecated and emits a warning when used
• exceptions now use Exception as e notation rather than Exception, e
• to get values dict you now use .values rather than .itervalues
• to get items from dict you now use .items rather than .iteritems
• most interactions with sockets are in bytes unless specified otherwise
• thread is now in the _thread module
• function code is now under .__code__ instead of func_code
• urllib2 modules have been renamed and moved all over
• division has changed so we need ot use past old_div and future division

Manual Regression Testing

There is no real unit testing in place to ensure things keep working, I'm going to be doing some manual testing.

• [x] bf.py
• [x] bitcoin.py
• [x] cdecl.py
• [x] choose.py
• [x] crowdcontrol.py
• [x] crypto.py
• [x] dice.py
• [x] dictionary.py
• [x] dotnetpad.py
• [x] down.py
• [x] drama.py
• [x] gcalc.py
• [x] gif.py
• [x] google.py
• [x] hackernews.py
• [x] hash.py
• [x] help.py
• [x] imdb.py
• [x] lastfm.py
• [x] log.py
• [x] mem.py
• [x] metacritic.py
• [x] misc.py
• [ ] mtg.py unrelated breakage
• [x] pre.py
• [x] profile.py
• [x] pyexec.py
• [x] quote.py
• [x] religion.py
• [x] remember.py
• [x] rottentomatoes.py
• [x] seen.py
• [x] sieve.py
• [ ] snopes.py unrelated breakage
• [x] somethingawful.py
• [x] stock.py
• [x] suggest.py
• [x] tag.py
• [x] tell.py
• [x] tinyurl.py
• [ ] translate.py unrelated breakage
• [x] tvdb.py
• [x] twitter.py
• [x] urlhistory.py
• [x] validate.py
• [x] vimeo.py
• [x] weather.py
• [x] wikipedia.py
• [x] wolframalpha.py
• [x] youtube.py

To Do before Ready

• [x] Regression Testing
• [x] Set up tox for testing across Python 2 / Python 3
• [x] Travis-CI?

[imnotjames]

If we want to use Travis CI for automated testing, that can be done with tox-travis

[rmmh]

Thanks for all the work! I think #185 is the only item left?

[rmmh]

I'm ok with only supporting Python 3, if it makes this PR simpler.

[imnotjames]

It would not change all that much. Mostly, it'd drop the future dependency and a handful of lines using that. Otherwise, python 2.7/3.0 don't have all that many hard differences.

[elitan]

Nice job. Time to merge!

[sklnd]

LGTM, very exciting

[rmmh]

Thanks for all the work! I just merged this with a minor fix for the cdecl test.