pixel-painter was depending on the old readline code that
returned nil for empty lines however empty lines should
have returned an empty string
Change-Id: Ic06ce920a7ab38e1fb8f7197d637e74ed9e35653
* 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