Velociwrapper

- fixed all() and search() (broken by the last update!)

- fix get_in() to properly use _create_obj_list()
- get_in() no longer catches exceptions (was returning an empty list)
- _create_obj_list() filters out docs that returned found: False to
prevent an exception when creating the object
- this has the effect of returning all found documents from list calls
- instead of throwing exceptions / returning empty if a single doc fails
- we believe this was the original intended behavior
- Fixed get_like_this()

- allow _create_source_document() to have a specified date or datetime
format
- fixed to_dict() to return date_time format in true ISO 0000-00-00
00:00:00
- fixed date object creation being turned into datetime

- fixed collection calling wrong variable name when a custom index is
specfied
- velociwrapper.__version__ returns the version number of the module now

- added callback argument to commit

- bulk commit now returns the status of each commit
- fixed date time format to work with bulk commit