RDF::Sesame::Repository now supports "DELETE" and "DELETE DATA" queries

Signed-off-by: Aymeric Brisse <aymeric.brisse@perfect-memory.com>
HTTP response checks : Use the code instead of the message

Signed-off-by: Aymeric Brisse <aymeric.brisse@perfect-memory.com>
Merge pull request #9 from PerfectMemory/master

Merge with PerfectMemory:master