Remove unused imports for Temporary and spec
Introduce Temporary.using for ensuring directory cleanup after use
Switch to Temporary.using in specs
Merge pull request #22 from ambiata/cofarrell/temporary-using

Introduce Temporary.using for ensuring directory cleanup after use
Cleaned up dependencies.
Bump scalaz version to remove bogus coverage dependency.
Remove redundant joda.convert dependency.
Support for scala 2.11.

Fixes #18.
Extra tweak for parboiled on 2.11.