Bumped to 5.0.2 in preparation for next release.
Include the script template files - fixes #220

The rename of the script template files to be .tmpl put them
into the realm of package data, rather than python files that
would be bundled automatically. Include them specifically in
package data so that they'll actually be installed.
Update changelog
Added tag 5.0.2 for changeset 95996b713722
Bumped to 5.0.3 in preparation for next release.
Move tests.sh to a tox config

--HG--
extra : source : 0d6a065483104cc9781a3ff72c168f059ec11036
Ignore the tox folder

--HG--
extra : source : f78ffe97964c6becbf42e946bf6504e8dc09f13b