Unification of logging, added manager, location to logs.

This commit intends to fix a non uniform behavior of logging across modules, as well as
different implementation of logging. Some modules/files which intentionally implement
their own logging version have not been modified.
Moved chimeraguider to controllers; disabled expose commands to camera.
Restored import of chimera.core.log for files using setConsoleLevel.
cknowledged commit of chimeraguider to controllers!
Merge Nelson's logging branch.

Some stuff were removed and will be merged back later (pyfits->astropy for instance)
Merge remote-tracking branch 'nelson/logging'

* nelson/logging:
  cknowledged commit of chimeraguider to controllers!
  Moved chimeraguider to controllers; disabled expose commands to camera. Restored import of chimera.core.log for files using setConsoleLevel.
  Unification of logging, added manager, location to logs.