Document theory of rotation and how to implement
Closes #11 to use rotation Text.angle directly
Honours spin and mirror settings

Adds spin theory as comments
Add latest version and presets comment to usage, increment version
Update NEWS.txt and rename to NEWS.asciidoc
Working alpha with spin and mirror
Tested & fixed alpha with spin and mirror
Tidy and correct HelpText, dev code and comments

Deleted unused debug function print used layers
Clean up comments and commented out development code
Update HelpText and further comments cleaning
Correct HelpText
Remove unused variables
Update NEWS
Merge branch 'dev/rotation'

Feature branch to implement support for spin and mirror.
It updates the package creation to also honour spin, rotation and mirroring
then modifies the ADDing of this package with zero angle.
Closes #1
Closes #11
Closes #14
Release version 1.2

Update version number in NEWS.asciidoc and hershey-text.ulp