v1.13

Added two hints to later puzzles to help prevent players from getting stuck.

Note: You can still download the old version, v1.12, for a slightly more cryptic experience.

Changes:

• Highlighted n7 in Puzzle 11.
• More info added below Puzzle 0, "All 12 puzzles follow..." and (print version only) "Erase if you make an error".
• Puzzle 0 is slightly less ambiguous when solving (again).
• Small tweaks to Puzzle 12's ink.