naive implementation of rpm %attr directive
Add --debug-workspace

Avoids Package#cleanup calls and also prints the paths, if not empty, of
any build or staging directories used for input or output.

Fixes #720
Don't install dependencies when using pip to download python packages
Show full input path if it can't be found.

Before: Cannot package the path 'pganalyze-collector', does it exist?
After: Cannot package the path './build/pganalyze-collector', does it exist?
Merge pull request #727 from dknecht/master

Don't install dependencies when using pip to download python packages
Merge pull request #734 from jordansissel/add-debug-workspace

Add --debug-workspace
Small note on additional package requirements.
Require compiler for gem install
Merge pull request #740 from rnelson0/master

Small note on additional package requirements.
Merge pull request #719 from leslieianson/master

Specify %attr directive on a per-file basis
Merge pull request #5 from jordansissel/master

latest from Jordan