Rename: s/ecukes-tags/ecukes-include-tags/g
Refactoring: add ecukes-setup-tags
Add failing tests for ecukes-exclude-tags
Implement ecukes-setup-tags for exclude tags

Previously failing tests passes now
Add a failing test: run-scenarios-with-exclude-tags
Implement exclude-tags for ecukes-run-feature

Previously failing test passes now
Add a test for running features with complex tags
Do not use --map macro; use -map instead
Mention how to exclude tags in usage
Merge branch 'exclude-tags'
Add Takafumi Arakaki in copyright section.
Update to version 0.4.1.
Make test/ecukes-test Linux-friendly

In some environment /usr/bin/env does not allow arguments.
Add some more targets in Makefile

`make` now works without explicitly doing `carton install`.
Merge branch 'test-suite-tweaks'