Oracle: build with qtjson
OracleImporter: use json to parse cards in sets

Problem: Split card are imported as 2 different cards; need to find
some way to join them
Corrections to sets.xml for mtgjson.com

 * Used http://www.woogerworks.com/files/sets.xml as a base
 * update version
 * use mtgjson.com as source
 * adapted some sets name (es: 6E => 6ED)
Caveats:
 * Not all previous sets are present (e.g.: WOTC, WMCQ, WRL); they were
not present in woogerworks’s sets.xml anyway
Fix import of P/T; misc optimizations
Use mtgimage.com for card images
Keep gatherer as image source; mtgimage as a hq alternative
Oracle: build with qtjson
OracleImporter: use json to parse cards in sets

Problem: Split card are imported as 2 different cards; need to find
some way to join them
Corrections to sets.xml for mtgjson.com

 * Used http://www.woogerworks.com/files/sets.xml as a base
 * update version
 * use mtgjson.com as source
 * adapted some sets name (es: 6E => 6ED)
Caveats:
 * Not all previous sets are present (e.g.: WOTC, WMCQ, WRL); they were
not present in woogerworks’s sets.xml anyway
Fix import of P/T; misc optimizations
Use mtgimage.com for card images
Keep gatherer as image source; mtgimage as a hq alternative
Merge branch 'mtgjson-importer' of https://github.com/ctrlaltca/Cockatrice into mtgjson-importer
Merge splitter cards into a single card
Import data from mtgjson's allsets.xml

* add multiverse id to cards.xml
* remove pictures urls from cards.xml
TBD:
* fix/clean oracle’s gui
* add support in cockatrice
Rewrite oracle as a wizard
Merge branch 'master' into mtgjson-importer
Add settings fields for pic urls
Use picUrl templates to download cards.

Add HQ card option
Merge remote-tracking branch 'upstream/master' into mtgjson-importer