Strip all hint links

Before processing HTML markup, strip off any hint links.
Option to remove hint content

Allows the div that contains a hint field to be stripped out.
Implement advanced substitution rules

This is triggered off the keys as usual, with the addition of doing
normalization before each rule is executed so the user gets a clean
starting point.
Detect bad replacement strings

This is triggered when a replacement string has a replacement
placeholder that is higher than the available groups.