Tradedangerous

NOTE: '--detail' (-v) is now a common option, i.e. must come before sub-command
trade.py cleanup -v << won't work any more
trade.py -v cleanup << new order
Added 'nav' sub-command for navigation assistance:
trade.py nav [--ship name [--full]] [--ly-per] from to
Added '--quiet' (-q) common option for reducing level of detail, e.g.
trade.py -q cleanup

Fix for Issue 7: --avoid not working with systems that have no stations,
Additional help text,
General cleanup,
Running "emdn-tap.py -v" will show price changes,

- Updated shipyard to EDDN v2 schema.
- Updated outfitting to EDDN v2 schema.
- Updated commodity to EDDN v3 schema.

Jul 08 2016 (bgol, horizon branch):

- Let the user know about the API response.
- New option "test=[FILENAME]" to test the plugin.
- New option "warn" to ask the user if the API response differ from
the database entry of the station.
Default behavior is now to just warn the user know about it.

Jul 07 2016 (bgol, horizon branch):

- Reworked station data handling
- Reworked consistency checks for API <-> DB diffs

Jul 06 2016 (bgol, horizon branch):
. Data update from maddavo.
. New EDCD plugin which also can update the items.

- Call new EDCD plugin for option 'edcd'
- Reworked demmand/supply handling
- Added consistency checks for "what" to import compared to what the
station should offer.

Jul 05 2016 (bgol, horizon branch):
. Added category and suppressed to RareItem and updated data.
. Show "Category/Itemname" if more detail is requested for the "rares" command.

Jul 03 2016 (bgol, horizon branch):
. New import plugin "netLog" which parses the netLog files and add new
systems to the database (see README for description).

Jul 02 2016 (bgol, horizon branch):
. Merged changes from devel branch into horizon (see below).
. Data update from maddavo.
. Added "--planetary" argument to buy, local, nav, rares, run and sell command.
The "--no-planet" and "--planetary" arguments are mutually exclusive.
(implemented issue 5)

Jul 02 2016 (bgol, devel branch):
. "Chunked" transfers don't need a length header.
. Added new tables for FdevID -> EDDN mapping
. Added FDEVMapping classes for Items, Ships, Shipyard
and Outfitting.