Add Reader that constructs graph using AbstractGraphBuilder

Add Class to read db and build graph using abstract graph builder

Add tests
Add gen-sql option to crawler

Implement Restart

Implement restart ability with Graph DB Implementation

DB Backed Graph Implementation

Move from in memory representation of graph to SQLite backed represen…

…tation (#14)

* define Graph as ABC and provide an in memory impl
convert all code to use Graph ABC (except instantiation in cralwer)
convert from using in memory sets to using generators

* Create db backed implementation of graph using SQLite

Add keyring support

Password can now be retrieved via keyring. Service name is "fs-crawler"

Fix for pre 3.10 versions of python

v0.2.4

support pre 3.10 exception formatting

Validate graph before completing crawl

As the last step of a crawl, validate the graph and save .validated.x.csv files

Code Simplification, Prepare for checkpointing iterations

The code changes for this release are primarily for simplification and to prepare for implementing iteration checkpointing

Update to match FamilySearch API changes

The packages was updated to support FamilySearch API changes (resulted in HTTP 301 with old version).

Additionally, a few enhancements were made to reduce the number of calls made to the FamilySearch API

Restart/Continue Capable

This release has fixed a few bugs in the resolution of relationships. The major enhancement enables restart/continue from a previous run.

Preserve preferred name

Preserve preferred name for an individual

Restructure crawler.py to allow for calling from another script