propellor 2.15.1 released with [[!toggle text="these changes"]]
[[!toggleable text="""
   * Added git configs propellor.spin-branch and propellor.forbid-dirty-spin.
     Thanks, Sean Whitton.
   * Added User.systemAccountFor and User.systemAccountFor' properties.
     Thanks, Félix Sipma.
   * Gpg.keyImported converted to not use a flag file and instead check
     if gpg has the provided key already.
     Thanks, Félix Sipma.
   * Merged Utility changes from git-annex.
   * Clean build with ghc 7.10."""]]