use codemirror for displaying file contents
rename codemirror file
add owl text mode support
add edit ontology file functionality
add reset button and improve style/view
replace 'Home' by repo name in breadcrumbs
add notice on editing mode
move edit button to breadcrumbs bar
fix utf8 display error
style codemirror text field for disabled js
fix utf8 error in diff
fix erroneous ontology spec
clean redis-db namespace before each spec.
improve redis cleaning rake task method

Instead of calling delete for each key, we call
delete for all keys at once.
Merge branch 'staging' into 23-codemirror_integration

Conflicts:
	spec/controllers/ontologies_controller_spec.rb
Fixed wrong git URL for codemirror.
hide edit button if file too large
make edit mode text more descriptive
major refactoring, restructure functionality

* merge reset and cancel button functionality into discard button
* view enhancements
* simplifying javascript code
major refactoring, restructure functionality

* merge reset and cancel button functionality into discard button
* view enhancements
* simplifying javascript code