Merge pull request #141 from spadgett/master

fix incorrect assertions in RdfSourceTest.putReplaceResource
avoid special characters in slug header test

Per RFC 5023, the server may change or remove special characters in the
Slug header when creating resources. Try to pick a string that will
likely be accepted as-is (a short string with only alphabetic
characters). Also ignore case when checking if the returned location
contains the slug.

See http://tools.ietf.org/html/rfc5023#page-30
Merge pull request #143 from spadgett/slug

avoid special characters in slug header test