Add ability to pass owned cards as param

Change -o=XXX to parse XXX as cards if XXX cannot be opened as a file.
Adding option to README
Version 2.5.0
Merge branch 'draquila-parse_owned_cards_as_string'
Merge remote-tracking branch 'upstream/master'
new command line syntax
warning for long attack decks
Adjust simple UI to new syntax plus new features
new cards.xml and missions.xml needs adjust unittests
add new cards and missions up to Albatross
[FIX] remove crash caused by new skill flurry
Version 3.0.0
[BUG] In SimpleGUI flags are mixed with operations #36
-o option can be placed behind operations
add Thread Option to Simple UI
Version 3.1.0
simple UI allows to update cards and missions.xml
simple UI launches editor for main .txt files
preparation before merge with 3.2.0
Updated cards and missions