Merge pull request #62 from udhos/master

Add setRotationMatrix().
bumped pubspec version to dev
fixes for checked mode
Fixed analyzer warnings
cleanup in console_test_harness

fixed test task and removed dead doc task
Generalize Vector impl
Merge pull request #64 from kevmoo/master

Misc cleanup
Add up vector type.
Make setRotationMatrix() compatible, in respect to inversion, with
setViewMatrix().