v0.7.0

Many thanks to @JoakimDeak, @jasikpark, @luxferoo, @logaretm and @Yovach for contributing to this release.

• Add is method which can be used as a type guard (pull request #13)
• Throw all validation issues of a pipeline by default (issues #18)
• Add abortPipeEarly option to abort pipe on first error (issues #18)
• Add abortEarly option to abort on first error