convert rvl vocabulary to sorted turtle

copies of the old version re saved for migration purposes and because
the docu generator lode requires rdf-xml
move old version to legacy folder
turn rvl schema to ttl and rename
ignore project files
deleting probably inferred statements

deleting these does not harm the code generation, but the identity
mapping casting problem remains
[FIX] wrong domain of targetAttribute

(this caused identity mappings to be also P2GAMs, leading to class cast
issues and indeterministic bebehavior)
Merge pull request #64 from janpolowinski/leaner-ttl-rvl

Leaner ttl rvl