Editing the buttons for development cards to be textual, and I changed
the confirmation dialogue to be text based as well. Will now also
display the current Player's number of development cards.
Modified placement order of buttons so that the board is added first,
and thus all board clicks are handled first. Still need to do something
more permanent to fix the issue with button overlap.
Merge pull request #35 from Databean/DevCardUI_textButtons

Dev card ui text buttons