Tag Inheritance

* subclass methods that don't specify tags, get the parent's tags
* subclass methods overwrite the parent's tags if the subclass specifies
  any
* subclasses can also do "sub foo : Tags(+new_tag -old_tag)" to add and
  remove tags.
* empty tag lists are supported now to completely override the parent's
  tags
ignore swp files
add the first draft of the tutorial
add another placeholder for more content
added more to the tutorial. tested and fixed example code
add Skip paragraphs
add a paragraph or two on Tags
Merge pull request #13 from oalders/master

Typo fix
Update changes with oalders contribution.
Merge branch 'tags' of https://github.com/pboyd/test-class-moose into pboyd-tags
Bugfix: keys $... doesn't work on older Perls.
Merge branch 'master' of https://github.com/preaction/test-class-moose into preaction-master
Formatting fixes and using standard file names.
Correct some terminology.
Correct paths again. More formatting. test_finished is actually test_teardown
Update Changes to reflect the tutorial
fix for bug 87801 on CPAN
Merge pull request #15 from wsdookadr/master

fix for bug 87801 on CPAN
Updated changes with a note on Stefan's patch.
Tiny comment to make dzil happy