TST: add test for create_joined_store.
STY: remove useless code.
TST: add basic tests for info_list_names.
TST: add some simple tests for install/remove actions.
TST: add simple Enpkg.execute tests.
BUG: fix py26 support.
REF: rename dummy egg to be consistent with its metadata.
TST: basic tests for the revert feature.
TST: add some tests for few utils enpkg utils.
BUG: forgot to add new test file.
TST: add some simple tests for Enpkg.query.
TST: add tests for check_prefixes.
TST: test get_writable_local_dir
REF: consolidate common test data in egginst.tests.common.
BUG: fix test function name used twice.
TST: fix tests following code review.
Merge pull request #131 from enthought/test_enpkg

Add tests for enstaller.enpkg module