Merge pull request #643 from kbwbe/tmp

Rework spanish translation (by hasecilu)

Merge pull request #529 from kbwbe/tmp

Remove python 2 support, work on translations

Merge pull request #509 from kbwbe/tmp

Tmp

Merge pull request #501 from kbwbe/tmp

Tmp

set version info to v0.4.57

Merge pull request #470 from kbwbe/tmp

add accessibilty function 'OneButton'

Merge pull request #457 from kbwbe/dan

include constraint diagnostic features of dan miel

Merge pull request #412 from kbwbe/tmp

Tmp

Merge pull request #409 from kbwbe/convertingParts

Converting parts

Merge pull request #407 from kbwbe/tmp

fix a bug within axialCoincident constraint