Merge pull request #52 from hynekcer/bugfixes

Fixed #14, improved #2,
increased timeout length for unit tests
Restrict unimportant messages in test_double_delete.
Improved auth tests for multiple databases. Test it just now!

Tests for multiple databases require a manual change from now on
in testrunner/local_settings.py: add the second SF sandbox configuration:
  DATABASES = {'default': {...}, 'salesforce': {...}, 'salesforce2': {...}}

The change for testing SALESFORCE_DB_ALIAS is only temporary and must
be tested immediately after this commit because it will be turn back
  settings.py:
    SALESFORCE_DB_ALIAS='salesforce2'

Conflicts:

	salesforce/tests/test_integration.py
Set a central import of "requests" package and use a patched version if possible
Improved raw "select Count() from ", not fixed.