Used ScalaRunTime.replStringOf()

Fixes #8.
Merge pull request #41 from tkawachi/repl-str

Used ScalaRunTime.replStringOf()
Support ScalaCheck

Breaking change: Property syntax is changed to ScalaCheck style.
It should return just a boolean value.

before:

    prop> (i: Int) => i + i should === (i * 2)

after:

    prop> (i: Int) => i + i == i * 2
Changed default framework to scalacheck
Fix typo
Merge pull request #42 from tkawachi/scalacheck

ScalaCheck support
change `doctestTestFramework` key type
Updated README
Renamed DoctestFramework to DoctestTestFramework
Merge pull request #43 from tkawachi/framework

Use case object as doctestTestFramework setting
Added 0.3.0 release note
Setting version to 0.3.0
Setting version to 0.3.1-SNAPSHOT
Updated README
Dogfooding 0.3.0
Updated lock.sbt
Modified parser to parse multiline output
Parse <BLANKLINE> in output
Updated scripted test
Treat `}}}` as an example terminator