v0.2.0 -video,  -o output-image-path, refactor
regionKeypoint
atan2-fix
v0.2.1 detect:keypoints for MSER. Args bug fixes. Unit tests.
detect image
q4Offset in degrees
color correction
keypoints with points drawn
q4Offset
Changed flags default for drawKeypoints. Eliminated q4Version as redundant given horizontal/vertical detection of covariance matrix
Modify CMake script to build correctly on more platforms

Signed-off-by: Paul Jones <paul@pauljones.id.au>