Localisation updates from http://translatewiki.net.
Standardize the copyright notice

To facilitate the process of bumping the copyright year, this commit unifies
the way the copyright statement is written throughout the code.
Update copyright year to 2013
Use date() for current copyright year in html_footer
Split very long echo statement on multiple lines
Remove typos in name of default configuration file
filter_api: apply all project_where_clauses first

where_clauses and project_where_clauses must not be mixed, since the
where_params are expected to be held in order - first for the
project_where_clauses and then for the where_clauses. 

Fixes #15320: Date filters broken since 1.2.12 
Localisation updates from http://translatewiki.net.