Docstrings for Database methods; oursql dependency.
Database schema, hashing module, some other things.
Some more database design work.
More work on db schema; all except FTS indices.
Remove languages table; add indexed field for codelet rank.
FULLTEXT KEYs where appropriate.
Fix some typos in the schema.
Move database stuff to a subpackage; updates.
Some more work on db stuff.
Update schema to v2; database updates.
Credits.
Finish migration to v2.
DB -> v3 for symbol->code assoc vs. ->codelet (fixes #13)
Flesh out most of Database.insert().
Database to v4: split off symbol_locations table.
Finish database insertion, except for origins.
Fix a couble Database bugs.
Database to v5; finish Database.insert().
Add prototype repo-indexer script author_files.py.

Add:
    author_files.py
        -add prototype script to output metadata about every file in a Git
        repository: filename, author names, dates of creation and modification.
        -lacking Sphinx documentation.
Mov author_files > git_inder, heavily refactor.

Add:
    bitshift/crawler/crawler.py
        -add base crawler module
        -add github(), to index Github.
Mod:
    bitshift/crawler/
        -add package subdirectory for the crawler module, and any subsidiary
        modules (eg, git_indexer).

    bitshift/author_files.py > bitshift/crawler/git_indexer.py
        -rename the module to "git_indexer", to better reflect its use.
        -convert from stand-alone script to a module whose functions integrate
        cleanly with the rest of the application.
        -add all necessary, tested functions, with Sphinx documentation.