dotify-formatter: handle white space correctly

- css-to-obfl.xsl: convert preserved spaces into non-breaking
  spaces and preserved linefeeds into obfl:br
- BypassTranslatorFactoryService: correctly handle non-breaking
  spaces, zero-width spaces and soft hyphens. Don't use
  BreakPointHandler anymore.

see issue #2
Anticipate a bug in Dotify white space collapsing (OBFLWsNormalizer)
Reenable tests that failed because of white space