Edited .gitignore

-repo should ignore backup CAD files and directories
renamed directories

-directory names with spaces don't mix well with github :(
modified .gitignore

lets hope this works...
Revert "modified .gitignore"

This reverts commit df0399e3bad017e0db9a0ac199990355fd1efb7d.
No spaces in filenames either, please!
removed Oldversions