We already have the convenient degrees() and radians() functions to convert
between angle formats. This commit involves a lot of refactoring here and
there and I may have missed some places where conversions were needed. But
hopefully there aren’t may such places.

Though it still is not possible to create a new window from a thread that did not init SDL

Reworked Primitive logic for scene rendering
FileUpdateTester works now .....

- removed 177 CR characters
 - removed 12 trailing whitespaces
 - replaced 0 tabs with spaces
 - fixed 1 svn:eol-style properties