Inial commit for new rewriting system.
Fix for handling percent symbols
More fixes for matching on percent symbols.
Updated docs.
Added profiling code.
Fixed more rules.
Fixed sections and improved handling of bullet items.
Made fixpoint optional.
More fixes for indentation and bullet lists.
More bullet list fixes.
Now padding start and end of blocks with nils.
Improved code for padding input.
Fixes for bindings.
Fix for links.
Fix for decorators.
Fixed typo.
Added back support for manual casting of identifiers.
Added back support for mathematical operators.
Restored support for superscript, subscript, and primes.
Restored support for fractions.