Added JQuery-localize plugin
(https://github.com/coderifous/jquery-localize) to callimachus.

Currently new locales are created as json to /callimachus/1.3/locales/.
Two examples locale-fi and locale-fr are provided as example (excuse my
French). 

To support json files, the text.ttl was minimally modified by adding
another media type: "application/json". Instead of adding another media
type to text.ttl, json.ttl could be created to support JSON validation
etc.

Currently only default-layout.xq and layout-functions.xq contains
@data-localize attributes that are been used to change the language.
However the attributes are easily added to any xhtml template. 

Adding localization to Docbook is bit trickier (suggestions are welcome)
and one can ask if docbook should even be supported in the future. Other
wysiwyg editors for html are available as well.