v1.6.6

Syntax improvements for text strings and hex strings:

• Character and hex escapes are properly classified inside text strings
• Illegal escapes were reworked as a catch-all of any character not previously identified as an escape
• Simplify the double quote "end" matcher
• Hex string entities were renamed to match TextMate recommendations
• Hex jumps were completely reworked to match every number as a numeric constant
• Illegal characters are marked as such inside hex jumps
• The hex placeholder character "?" is now defined as constant instead of lumped in with strings
• Special hex characters are reserved, such as brackets, pipes, and dashes