First pass at Sheraton

- Unfortunately, seems that something is causing an 'invalid selection' at the final step...
- Not sure if this breaks everything else (due to `post` / `get` changes)
- Also, may not need to do three pages; maybe just last two?
Fixed Sheraton 'Room not found' condition

- Still need to find 'room found' condition
- Also, changed how beautiful soup works; should be careful before merging
Added 'success' condition...

- ... probably.
- Also, does it matter if the selector text is ignored?
    - Maybe switch it all over to using cssselect?
Re-enabling other hotels
Merge pull request #5 from nt3rp/Sheraton

Sheraton Toronto Airport