Remove the legacy multirepositories system

Signed-off-by: Aymeric Brisse <aymeric.brisse@perfect-memory.com>
Use YARD::Rake::YardocTask in Rakefile

Signed-off-by: Aymeric Brisse <aymeric.brisse@perfect-memory.com>
Update Spira.using_repository to ensure the repository restore

Signed-off-by: Aymeric Brisse <aymeric.brisse@perfect-memory.com>
Merge pull request #24 from PerfectMemory/feature-unique-repository

Feature unique repository
Enhancing README.MD

Adding Ruby Syntax
Finish rdf-1.0.10-changes.
This addresses issue #23
Remove extraneous statement = in enumerable spec.
Merge branch 'origin/develop'
Finish RDF1.1.
This completes issue #21
Add the Google Group Link
Update specs to use real vocabulary terms in tests; RDF.rb now uses StrictVocabulary for pre-defined vocabularies, which prohibits use of undefined terms.
Update relations_spec to expect syntax do fix RBX issue.
Support for RBX >= 2.1.0.
Set VERSION to 1.1.0.
Finish 1.1.0