Merge pull request #5 from dani/master

Update fr_FR locale for DL 0.13
Remove dead strings.
Ignore msgmerge backup files.
Rename guide's source files from 'txt' to 'rst'
Update spanish translation from Roberto Salgado.
Add an example configuration for large-file uploads with Apache/PHP<5.6
Add some comments in the Apache configuration examples.
Fix fr locale for All Tickets and All Grants