Finger Jointed Boxes

Release 0.7 contain the following new features:

• makeFingerJoints: build finger jointed boxes from a simple solid model (https://cq-warehouse.readthedocs.io/en/latest/finger_jointed_boxes.html)
• clearanceHole can now make holes to capture nuts (https://cq-warehouse.readthedocs.io/en/latest/fastener.html#captive-nuts)
• screws are aligned with the bottom of a hole if a depth is provided (https://cq-warehouse.readthedocs.io/en/latest/fastener.html#screw-and-hole-alignment)
• projection, emboss and text on path examples extracted from extension examples for clarity

This release also fixes the following bugs:

• setscrews can be "simple" now and the thread module is changed to improve performance when making all simple fasteners