Added 'changed_date' and 'changed_by' to page_attribute template tag
Added test for features in last commit ('page_attribute')
spelling mistakes, yea
template tags don't take filters
fixed 'before_change' reporting time later than 'page_change,' due to some databases droping microseconds.
more absent minded mistakes.
yea, ...
Merge pull request #1915 from Klupamos/develop

Added 'changed_date' and 'changed_by' to page_attribute template tag