Buffers instead of pipes
Fix Test Name
Adding RSS test case.

Checks to make sure the xml document starts with <?xml.  Previously, the
html translate package would write additional details into the document
that caused it to fail.
Remove the hugo-nav function

Remove the hugo-nav since it relied on a slow library.  The current
build reimplements the absurl functionality based on string replace.
Discovered that my prior implementation missed the requirement for
making absolute paths (/path) absolute with the host, whereas a relative
path is left untouched.  Updated the test cases to support this if this
is reimplemented.