Remove static var - use implicits in load and loadFromCache methods

Fixes the thread-safety problem in DistDisambiguations and DistRedirects. Make required changes in the Test.
Merge pull request #22 from dbpedia/milestone2

Many code changes to make everything work with Path and XmlInputFormat. Completes milestone 2.
Convert all remaining File stuff to Path; single DistConfig instead of two classes.

DistConfig also wraps a Config instances and handles the logic required for selecting which properties should come from which files. Also, ConfigLoader is not extended anymore.
Add support for parallel extraction of multiple languages
Throw IOException in list, consistent with other FileLike impls
Set kryoserializer buffer to 100mb
Merge branch 'milestone3' of github.com:dbpedia/distributed-extraction-framework into milestone3