Make dtbook2sbsform into a Pipeline2 module

* Ant --> Maven
* XProc is used to pipe the XSLT's together
* `LiblouisSaxonExtension` and `liblouis-javabindings` are replaced
  with the Pipeline's braille modules
* Instead of installing the SBS braille tables in /usr/local/share/liblouis/tables,
  the are now used in 'module-form'.
* LineBreaker (previously Java) was reimplemented with XSLT
* Testing is now performed with XSpec run inside an OSGi container
* UTFX tests are automatically converted to XSpec with a script