1.1.0 - New default fixtures + fixture parameter names fix

Created 6 fixtures registered by default by the plugin. Fixed #14:

• fixture_store in an OrderedDict that can be used as a fixture store, typically in @saved_fixture.
• results_bag is a ResultsBag-typed results bag.
• session_results_dct and module_results_dct return a synthesis dictionary for all tests completed "so far", respectively in the session or module. They include
  contents from the default fixture_store, including results_bag.
• session_results_df and module_results_df are the dataframe equivalents of session_results_dct and module_results_dct

The documentation has been updated so that users can get started more quickly by leveraging them.

In addition:

• get_session_synthesis_dct can now take both a session or a request input. If a request is provided, the status of current item will be marked as 'pending', while not started items will be marked as 'unknown'.
• fixed bug in get_session_synthesis_dct: fixture parameters and saved fixtures where overriding each other in the final dict in flatten=True mode. Now fixture parameters appear as '<fixture_name>_param'. Fixed #15.
• @saved_fixture can now be used without arguments. By default it will store fixtures in the default session-scoped 'fixture_store' fixture.
• HARVEST_PREFIX moved to common.py and is now exported at package level.

See documentation page for details.