0.2.1

• Added BinarySize unit to measure file sizes, network data, etc.
• Added support for rounding, absolute value, sign, etc. Measures

val length = 25 * inches
println(length toNearest 1   * feet  )  // 2.0 feet
println(length toNearest 0.1 * meters)  // 0.6 m

• Fixed bug in Length