Initial dev release of Units API. The central function, unitsapi_convert(), is working great. Conversion types supported:
Length:
millimeter
centimeter
decimeter
meter
kilometer
foot
inch
mile
yard
Volume:
cubic foot
cubic inch
cubic mile
cubic yard
cup (U.S.)
gallon (Imperial and U.S.)
liter
ounce (Imperial and U.S.)
pint (Imperial and U.S.)
quart (Imperial and U.S.)
tablespoon
teaspoon