Adding a test template to be copied for making new test files.
Merge pull request #234 from notbenh/issue/230

Adding the as_* methods as requested in #230
Bring t/dump/formats.t up to standards.
Eliminate a layer of aliasing for the dumping methods.

* No need to keep the private dump methods around.
* Make "as_perl" the real one.  "perl" becomes just for backwards compat.