Add Cask-file.
Add -split-on, -split-when
Add -iterate, -unfold
Add -is-prefix/suffix/infix-p
Merge pull request #75 from Fuco1/prefix

Add -is-prefix/suffix/infix-p
Merge pull request #76 from Fuco1/unfold

Add -iterate, -unfold
Merge pull request #77 from Fuco1/split-when

Add -split-on, -split-when
Release 2.6.0
Merge pull request #60 from rejeep/cask

Add Cask-file.