Merge pull request #19 from jmwright/master

Added the example for using FreeCAD and CQ objects interchangably.
Merge pull request #20 from jmwright/master

First commit of the cheatsheet.
Merge pull request #21 from jmwright/master

Added a BREP terminology section.
fixed minor documentation errors
Merge pull request #24 from jmwright/master

Fixed some CSS issues and added more information on selectors.
fix issues: 25
fixed doc issues
Merge pull request #27 from jmwright/master

Added information on the core and selector classes.
Fixed copyright dates, added the STEP file importer, and added the supporting tests.