Update German language file

Added 100+ strings to german .po and .mo

Signed-off-by: Simon Kraft <simon@krafit.de>
Update FAQs with mention of template tag to list all coauthors

http://wordpress.org/support/topic/display-a-list-of-all-guest-authors-and-links
Add PHPdoc support to the template tags
New filter 'coauthors_search_authors_get_terms_args' allows you to increase the number of matches returned with AJAX co-author selection

http://wordpress.org/support/topic/ajax-search-doesnt-find-some-users-with-fix?replies=1
Optimizer-bot optimized images
A cli subcommand for adding author terms to posts that don't have them
If there isn't an author term yet for a co-author, avoid an erronous join that caused duplicate posts to appear.
Let's make this 3.0.5 so the bug fix gets out
Back to 3.1-working
Fix fatal error where 'author' query argument could be empty or missing a valid user
Merge pull request #101 from trnsnl/master

Updated German language Files
Add props for #101
Only use our custom term count callback if we're doing the nasty SQL query which includes the post_author.

If we're forcing Co-Authors Plus to just use taxonomy queries, then we can use the default callback. We still need to make sure our custom cache is cleared, however.

Closes #111
When filtering a user's published post count, use the value of their guest author profile if one is mapped.

Getting the coauthor representation of the user will automagically load the guest author object, which we then want to use to get the term.

Closes #112
Pass the correct field argument to get_user_by()

This bug had the nasty side-effect of sometimes assigning the current user to a post being edited with Quick Edit.
Method exists on the `$coauthors_plus` object