New features
- Substitution cipher - replaces each letter in a string with a corresponding letter from a custom alphabet. The custom alphabet is built using a user specified text string. Unique letters from the key are set first in the string, followed by the rest of the alphabet in order. TEST → TESABCDFG...
Changes
- Removed easter egg, it was fun until it wasn't
- Moved ROT text alphabet inside the collapsible div