* Changed keymaps to PLA and added to SOURCES and CATEGORIES file
* improved keymaps: implement wrap-around and key repeat
* change keymap according to screen orientation
* fix font size calculation
* use blocking button query in main loop
* replace tabs with spaces
* added manual entry
* added original author to CREDITS
Change-Id: Id67ae99cbb7a737c7f4608e278b77a389ac2ffa6
