text: Add some documentation to the text protocol
text: Add some documentation to the text protocol

Signed-off-by: Jan Arne Petersen <8c3575d1e692bfe9fd3220cb3956503cdd270f15@openismus.com>

Fantu/compositor-spice,giucam/weston,krezovic/weston,udoprog/weston,udoprog/weston,xorgy/weston,Tarnyko/weston-xdg_surface_present,jonnylamb/weston,Gnurou/weston,Gnurou/weston,giucam/weston,Fantu/compositor-spice,krezovic/weston,sir-murray/weston,kwm81/weston,kwm81/weston,eyolfson/weston,mchalupa/weston,Fantu/compositor-spice,jonnylamb/weston,Tarnyko/weston-xdg_surface_present,xorgy/weston,sir-murray/weston,eyolfson/weston,mchalupa/weston