Specify which columns/relations to load for request listings
Add Alembic auto generated files

Also add Alembic to requirements.txt
Fix up sys.path so evesrp can be found
Add location support in Killmails

Also added script for generating the location maps from a database dump.
Add system, constellation and region attributes to Request

Using Alembic for the migration.
Show the location a kill occurred
Merge branch 'systems-alembic' into sql-tuneup

Resolves issues #11 and #12

* systems-alembic:
  Show the location a kill occurred
  Add system, constellation and region attributes to Request
  Add location support in Killmails
  Fix up sys.path so evesrp can be found
  Add Alembic auto generated files