Assume settings pulled from the database are UTF-8.
Move special-case bytes conversion to _load method.
Add test for special-case bytes conversion.
Fix tests.
Added www.zetalab.de to sites in README.
Merge
Allow all models subclassing Displayable to be searched by setting SEARCH_MODEL_CHOICES to None.
Update search engine docs
Fix some type handling for settings in mezzanine.conf.
More Python 3 fixes for types in mezzanine.conf
Merge
Allow specifying optional left and top values to the thumbnail tag which control the centering of the thumbnail.  If non default values are used update the thumbnail name.

--HG--
branch : thumbnail_centering
Allow None to be used as a per_page arg for pagination, to bypass pagination altogther.
Force string type names for HTML5 form fields.
Merge
Clean up positioning code in thumbnail tag.
added three classes "left", "middle" and "right"

these classes are used by cartridge to use the entire space in checkout process
Merge
Added Sebastian Clemens to AUTHORS.
fix on __admin_media_prefix__ about the trailing slash