Addition of the Engine Block scenario

This build includes the follow changes:
Added another scenario and programs involving the engine block.
An execl spreadsheet relating the various programs to their respective scenarios.
Changes to multiple line selection in pedant screens (After selecting a single, move to end of the section you wish to highlight and press ENTER, while SHIFT is on).
Fixes to textfields (index selection and highlighting).
Improvements to the preview image in the camera menu.
Some changes to the structure of tmp.
Fixed issue with the directory paths in Linux/Mac OS.
Fixed reverse logic for position register recording type
Improved '@' update in the program instruction navigation menu.
Added camera exercise scenario: hideNSeek.
Reversed joint 3 for jogging.