In order to make the layout of all bots consistent, this commit
moves each bot into a folder with its name and modifies 'run.py'
so that only bots with such a structure can be executed. 'lib'
gets renamed to 'bots'.
This commit fixes a bug with deleting directories,
prettifies the program's path output, and adds the
commands 'cd' (without 'cd ..') , 'rmdir' and 'pwd'.
- Expose some information about user profile in `RestrictedClient`
class, like `full_name` and `email` of the user.
- Add `client` argument to `triage_message()`, now it's possible to
call bot with another method instead of calling the specified
keyword.
