0.5.0

New Features

• Default task to support spartan Rumfiles (rum :image => docker build --tag image .)
• Added RUM_HOME and RUM_PATH to change default home for image digest files and path for Dockefile, respectively

Changed behavior

• Prerequisites for the rum task are now interpreted as the PATH argument for docker build, or as the PATH and HOME for image files if a list is passed (eg: rum :image => [".", ".docker"]