Taught parser how to deal with commas
Added "square" and "sq" as a parsables
Gave up on 1foot -> 1 foot conversion.
Made a note about it
Expanded that note
Added "in" as an abbreviation for "inches"
Added support for "cubic"
Added "squared" and "cubed" keywords
Added "lightyear" as synonym for "light-year"
Added MPH
Processes "per"
Added kph