leftover changes from yesterday (gitignore db and core option changes)
Merge branch 'master' of github.com:Wordseer/wordseer_flask
Removed old models; added some attributes to new models.
First round of unit test bugfixes
Renamed grammatical_relationship to something better
Added ParsedParagraph. ParsedProducts, GrammaticalRelationship to __init__.py
Changed relationships and __repr__ of Dependency.

Added ParsedParagraph and ParseProducts to Dependency
Fixed issue where Dependency couldn't be printed if governor or dependent didn't exist
Fixed typo
Removed temp method in Document.
Added a __repr__ method to GrammaticalRelationship.
Added ParsedParagraph and ParseProducts models
Added ParsedParagraph and ParseProducts relationships to Sentence, Word, and Property
Added title to Unit, like in the pipeline
Structure extractor tests passing.
Words are now compared by their non-primary keys
SequenceProcessor is now working.
Removed debug code from testsequenceprocessor.py
Updated ParseProducts.

- ParseProducts are not associated with Dependencies anymore, they store
	their Dependency info in a list of dicts since there's info in the
	pipeline that can't be stored just in a Dependency object.
- ParseProducts now inherit from NonPrimaryKeyEquivalenceMixin.
Removed more debug code
StringProcessor unit tests now passing.

- StringProcessor no longer deals with Dependency objects since storing
  info is complicated and gets into related objects and such.
- Fixes #49.
Removed unnecessary dependencies.