Merge branch 'master' into develop
first draft of Scenery class added with mods required to other files
switch to using single background thread with queue for Scenery
switch from threading to multiprocessing to allow change of niceness
minor tidying while tuning background scenery loading
logging info added to debug slow bckgrn scene loading on pi
comparison tests threading v multiprocessing (non shared memory overhead)
Scenery module better using threading
32x32 pixel maps for reasonable loading on rpi and settle on threading system
use pythag distance
hide debug printing
FixedString functionality added
tidy docstrings
Some filters added to FixedString, including normal map. uv corrected on Cuboid
shaders to use mediump for compatibility with other gpu implementations
set dtype of numpy arrays as ctypes.c_float in case this makes integration with pypy easier
set_textures in Shape
tk fix thanks to Guenter Kreidl an revert np dtypes compatible with pypy numpy
oops previous line left in!
upate docs