readme: mention contrib/drm-convert

Close /dev/tty on exit

Introduce object criteria

Add "fb modifier" directive

Add GBM support

Extract common buffer logic

We'll add other allocators soon.

contrib/drm-convert: add 64-bpp floating point RGB formats

Add fb fill_zeros

Add floating-point 64bpp RGB formats

contrib: add utility to convert images to raw buffers

Add RGB565

Add more 32-bpp RGB formats

Add fb fill_file directive

Add fb format directive

Add checkerboard pattern

Useful when testing scaling.

examples/modeset: add basic modesetting example

Pick FB format from plane list

Add "mode" directive

Add line number info to properties

Extract parser to separate file