pull out VectorReader
started adding debug of vector
playing with getting vector from rgba, with rg positive x,y and ba negative x,y; not working yet
a couple of basic tests
pull out shared test fixture
add (failing) tests for combining positive and negative components
fixed up by scaling output always to int value
set alpha to zero
change ball blend modes and color so we can see where they are going
Merge branch 'add-tests'
Merge branch 'master' of https://github.com/mikemoraned/balls