Cad like manipulation#3

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hooger wants to merge 6 commits intozk-phi:masterfrom

Commits on Apr 21, 2018

initial commit
Gergely Horváth
committed
added utility functions for rotation and translation according to axis parallel to screen edge
Gergely Horváth
committed

Commits on Apr 23, 2018

bugfix rotation function degree-radian conversion)
Gergely Horváth
committed

Commits on Jul 31, 2018

fix handle local variables properly
Gergely Horváth
committed

Commits on Aug 1, 2018

add det3x3 ad invert3x3 functions
Gergely Horváth
committed
mod docstrings according to flycheck
Gergely Horváth
committed