Generate just one card + Other Improvements

You can now choose to have Sudowrite make only 1 card in Write Settings.

This setting affects Auto Write, Guided Write, and Tone Shift.

More Improvements:

• Switching to Guided Write in the Write menu now starts Guided Write immediately.
• We've added a Frequently Asked Questions page to the (?) Help menu.
• You can now access the (?) Help menu on the Homepage.