changed variable initialization for more automation
changed variable initialization for more automation

themeCardNames, themeTiers and themeTierChances now call upon their
respective function, readXXX(), to retrieve the data from files created
by editTheme(). It reads from the 'themes/themeName' directory, so all
you need to do is insert a tierName, and if the directory exists, it
automatically loads the data for you.

nbness2/TradingCards