phpdoc for template functions in several files.

Signed-off-by: enyst <engel.nyst@gmail.com>
Add phpdoc for Search, Settings, SplitTopics templates.

Signed-off-by: enyst <engel.nyst@gmail.com>
Add phpdoc to Themes, Stats, Who templates.

Signed-off-by: enyst <engel.nyst@gmail.com>
Merge pull request #352 from engelnyst/doc_templates

Doc templates