Circleguard

This release splits `Circleguard` into `circlecore` (pip module) and `circleguard` (gui with `pyqt` as the frontend, using `circlecore` as the backend).

Changes:

* replays can be loaded from arbitrary locations (db, osu website, mirror website, osr file)
* convenience methods for common use cases added (checking a map or user)
* support for comparing two arbitrary replays (from two different maps, if you so choose)
* logging overhaul, any important action is logged
* major code cleanup
* removal of command line interface
* code standardized for pip upload (`setup.py`, `__init__.py`, etc)

* fix non-osr files being loaded as osr

* fix replay being compared against itself with -m -u

* fix fatal error when using both -l and -m flags

* new profile screener that checks a user's top n plays for replay stealing and remodding when -u flag only is passed
* ability to restrict what replays are downloaded (and compared) with the --mods flag
* major internal cleanup with the addition of the user_info class
* fix names starting with an underscore not being displayed on graphs

* use 15 second timeout for requests