Improved and renamed the collection script

Some work done by @sharanagrawal. Closes #1.
Script can now fetch posts of all the friends

Friend IDs are not written to disk now.

Only first 5 pages of posts are fetched.
Added a script to extract all messages for each friend
Added Facepy, Requests and Six Packages

So, no virtualenv is required and the scripts can be executed directly.
Added a script that finds all 'book bucket' posts

...and a lot of other things.
nothing important