Better support for URL template transformation

The URL template in Wikipedia allows editors to insert also
a non-absolute URL, resolving it for them with a default URI scheme.

There are some cases in Wikipedia articles where this applies, and the
framework should support this.

With this patch Template:URL is transformed adding a default http:// URI scheme
if the URI does not provide one.

Also some unit tests have been added for the LinkParser
Issue #133: Image files copyright is not analysed

Due to a typo in a for loop the ImageLinkRegex was not unapplied
on file articles.
improve namespace / language clashes in WikiTitle.parse (#129)
Merge pull request #134 from ninniuz/133_fix_image_regex_for_loop

Issue #133: Image files copyright is not analysed
Merge pull request #124 from ninniuz/fix_url_template_transform

Better support for URL template transformation
Merge pull request #135 from jimkont/language_namespace_clash

improve namespace / language clashes in WikiTitle.parse (#129)
Issue #129: Handle namespace and language clashes in wiki titles
Merge pull request #132 from ninniuz/129_handle_namespace_and_languages_wikititle

Issue #129: Handle namespace and language clashes in wiki titles
add support for maven deploy in maven.aksw.org
Merge pull request #137 from jimkont/maven_repo

add support for maven deploy in maven.aksw.org
Issue #136: Move to scala-maven-plugin
Merge pull request #138 from ninniuz/136_scala_maven_plugin

Issue #136: Move to scala-maven-plugin
refactoring of the mappings package: Renames Extractor to PageNodeExtractor and Mapping to Extractor
Merge branch 'master' of https://github.com/dbpedia/extraction-framework into core-refactor
merged with remote/jimkont Extractor branch
added xxxExtractors for each parseType and remove Typearg in Extractors
completion of last commit