Added header to general layout for frontpage
smaller menu changes for better usability
added uniform user error and -status feedback throughout all views
further rework on user error and feedback on views
update blog entry
refactoring Blog: moved base pages from ShowcaseBundle to BlogBundle for individual editing
rework view of Blog
Fixed spelling for consistency
Fouten afhandeling in Blog uniform maken + fix dubbele validatie
Fixing smaller layout bugs in blogs page