quantity 0.1.3

Facilitates working with physical quantities.

###0.1.3

• Added operator == and hashCode to quantity range classes.
• Added toTypedQuantity to MiscQuantity.
• Changed googol constant to arbitrary precision.
• Renamed private _dimensions constructor to _internal in quantities.

###0.1.2

• Precise isInteger and _limitPrecision fixes.
• hashCode testing for quantity objects (esp. Scalar)

###0.1.1

• Temperature, TemperatureInterval tests, tweaks, bug fixes.

###0.1.0

• Initial version.