clean up packaging of regexes.{yaml,json}

copy it into the package directory, and convert to json, *before*
letting the install proceed.  that way we can specify both as
package_data files, and pkg_resources.resource_filename will
just work.
use pkg_resources to find regexes.{yaml,json}
bump python port to version 0.3.3
Merge pull request #217 from rascalking/py-install-refactor

clean up install/lookup of regexes.{yaml,json}