change character encoding to utf8. this should fix #320
Link to ontology versions fixed.

closes #320
ontologies/index.html.haml splitted
Display clone URL in a selectable text field.
Save and display timestamp of last successful synchronisation.
Views improved
SimpleForm fixes for Bootstrap 3 added

http://www.iconoclastlabs.com/blog/using-twitter-bootstrap-3-with-simple_form
SimpleForm extensions for bootstrap 3 added.

Slightly modified from:
https://github.com/plataformatec/simple_form/wiki/Twitter-Bootstrap-v2-and-simple_form-v2
Refactoring of the clone configuration.

'mirror = true' added to overwrite all local refs.
Recursion replaced by a while loop.

This avoids a 'stack level too deep' #328
Only display source fields on creation of a repository.

solves #312
disable changing the source information by the controller, make #312 more secure
link to ontology in file view. close#296
show all ontologies to a file in file and directory view
rename File.real_basepath to File.basepath
rename link to 'update file' in file view. fix #297
refactor ontology list in file view
re-add repository nav to ontology-sub-index pages
update test to use new interface
delete links on ontology deletion. fix #331