Modifying bot to use twitter IDs instead of nicknames
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 Reason for change: thameera is stupid
 Other stuff:
 - bios stored in a bots.txt file now
 - users.txt is now just a list of twitter IDs

TODO:
- have a bug where bots.txt file read stops in the middle.
Fix for bots.txt read/write issue
Adding support for tracking username changes
Merge pull request #1 from chathuraw/master

Modifications for tracking using ID and tracking username changes