Bugfixes, exporting functions and interface translations

GanttProject 2.0.5 news:

• Custom fields are supported in Samara HTML export theme.
  
• Resource table now saves the state of shown columns in a project file
• Annoying problem of incorrect rendering of task completion bar is fixed
• New Slovenian translation and updated Japanese translation

We are very close to the release of GanttProject 2.0.5. Hopefully the release candidate build will be ready in a few days.