Renamed src/ouroboros to src/OPA
Changed OPA to opa in source folder.
Renamed namespace ouroboros to opa.
Merge branch 'rename-OPA' into dev
Added dummy grammar file.
Failed attemt to cmake the parser.
opwig is now compilable.
opwig's MDParser is generated with cmake.
Merge branch 'cxx-parser' of github.com:Rewasvat/ouroboros into cxx-parser