tkbio_connect: check if already connected
tkbio: notify sim after initial print
fix typo
tkbio_fb: fix border drawing
- add missing functions to header
tkbio: fix press/release/move of connected buttons
- tkbio_fb: add 'field' functions
- Makefile: compile libalg with debug symbols
tkbio: 'simplify' tkbio_connect
tkbio: fix border drawing after button release/move
- tkbio_fb: methods renamed, new method rect_border
tkbio: fix bug if event.y==0