physical 0.6.0

Lightweight library for dealing with physical quantities, units, and conversions.

0.6.0

• Renamed systems to units
• Moved scalar units to units/scalar.dart
• Quantity.scaled() now accepts a num as well as a Quantity

0.5.1

• Fixed prefixed unit scaling 2c393b1
• Reorganized examples

0.5.0

• Various improvements.