Extract Flags.parse() to remove duplication
Declare type for Interpretter.run
Add InterpretterSpec for option
Introduce Read[Char]
Bump specs2 and shapeless to support Scala 2.10.4
Fix rendering of Both usgae due
Add Parse.option and Parse.default combinators
Merge pull request #8 from markhibberd/topic/optional-argument

Optional arguments
Rename TestSpec to TextSpec
Simplify Text.space()
Fix spelling mistake in TextSpec spec
Fix TextSpec drains() when spaces are used to wrap
Improve performance of TextSpec drains() due to excess array copying
Optimise the shit out of Text.wrap() for no good reason
Fix excessive prop generation in TextSpec with custom Gens
Tweaks for using customer generators.
Use arbitrary[String] instead of Gen.alphaStr for LongLine