Alembic database version control

fixes #29 (closed)

@jmfee This revision's downgrade option will only remove api specific tables and not the alembic_version table created by this package. Is this the desired behavior or should downgrade also be removing this additional table?

added 5 commits

• a27a35ab...79c02d85 - 2 commits from branch ghsc/geomag:master
• f1883353 - Add alembic to Pipfile/lock
• c4261cc7 - initialize migrations directory
• 8d0ac741 - add first revision

Compare with previous version

merged