- ico for win
- icns for mac
both now with several resolutions inside and high res support

mac version even included old+different logo

Requires #889

Additionally, remove an unneeded split() + join() call on every card
text

 * ignore .tx folder
 * cmake: when UPDATE_TRANSLATIONS=ON, extract new strings only to the
english translation file.
 * added info in CONTRIBUTING.md
 * updated english translations

Updated logo

Consistency for certain affixes

Added new strings for Cockatrice
New Oracle translation
Cleaned up vanished strings

Translations have been updated.

Imported unzip methods from OSDaB-Zip project;
Adds a soft dependency on zlib to oracle; if lib if not found, oracle
will continue to compile and work but without zip support.

 * Always install “release” plugins
 * install only plugins actually used

ucfirst(setCode): requires oracle re-run
reorder columns
rename the “short name“ column as “set code“
ensure proper casting for releaseDate and sortKey fields (refs 00a5ed0b)

Let oracle add a basic TK set in cards.xml
Unify all the code previously using the string literal “TK”

and save them in cards.xml

Should avoid the problem explained in #414

fixes #411