Fix for multiline literals generation in TURTLE output

[indeyets]

This fix uses RDFlib for proper encoding of literals (it's better to reuse results of someones hard work)

Here's the difference before and after the patch:

--- before.ttl  2013-12-05 15:16:00.000000000 +0400
+++ after.ttl   2013-12-05 17:09:07.000000000 +0400
@@ -4026,8 +4026,8 @@
     .
 schema:accessibilityAPI a rdf:Property;
     rdfs:label "Accessibility API"@en;
-    rdfs:comment "Indicates that the resource is compatible with the referenced accessibility API (WebSchemas wiki lists possible values).
-     "@en;
+    rdfs:comment """Indicates that the resource is compatible with the referenced accessibility API (WebSchemas wiki lists possible values).
+     """@en;
     rdfs:domain schema:CreativeWork;
     rdfs:range xsd:string;
     rdfs:isDefinedBy <http://schema.org/CreativeWork>;
@@ -4461,10 +4461,10 @@
     .
 schema:audienceType a rdf:Property;
     rdfs:label "Audience Type"@en;
-    rdfs:comment "The target group associated with a given audience (e.g. veterans, car owners, musicians, etc.)
+    rdfs:comment """The target group associated with a given audience (e.g. veterans, car owners, musicians, etc.)
       domain: Audience
       Range: Text
-    "@en;
+    """@en;
     rdfs:domain schema:Audience;
     rdfs:range xsd:string;
     rdfs:isDefinedBy <http://schema.org/Audience>;

[indeyets]

this change is still not applied to http://schema.rdfs.org/all.ttl

[indeyets]

@mhausenblas is there any chance for getting updated "all.ttl" file online?