Dutch translation
Merge remote-tracking branch 'upstream/master'

Conflicts:
	zp-core/locale/nl_NL/LC_MESSAGES/zenphoto.mo
	zp-core/locale/nl_NL/LC_MESSAGES/zenphoto.po
re-gen dutch
fix #150
#156

Clears the line after third album thumb. This does mean that the thumb
real estate may be un-even, so maybe better would be to truncate the
titles. But this is useful anyway.
Merge pull request #157 from sbillard/master

consolidated updates