Completed implementation of SpecBuilder'3
Completed implementation of SpecBuilder'3

yukitos/FsCheck,kos59125/FsCheck,yukitos/FsCheck,cloudRoutine/FsCheck,dungpa/FsCheck,fsharp/FsCheck,fscheck/FsCheck,forki/FsCheck,forki/FsCheck,paulyoung/FsCheck,jhamm/FsCheck,sideeffffect/FsCheck,fscheck/FsCheck,paulyoung/FsCheck,yukitos/FsCheck,vasily-kirichenko/FsCheck,cloudRoutine/FsCheck,ErikSchierboom/FsCheck,ploeh/FsCheck