[#770] Example of search box auto-fill on projects listing page

The actual search functionality has not been implemented yet, but an example of the search box can be seen on /projectsearch. Typeahead.js is used with a combination of local files (country and continents) and remote lookup (projects and organisations). Still need to:

- Test the performance on live database
- Clean up code (put javascript in seperate file)
[#770] Sample suggestions box on projects listing page

- Merged with 'feature/rsr_v3'
- Added typeahead with projects, organisations, countries and focus areas
- When clicked on a project, the user is directed to the project page
- Did not look into styling that much, so that should be improved

Conflicts:
	akvo/rsr/static/lib/js/typeahead-0.10.5.js
	akvo/urls/rsr.py
[#770] Added CSS for bootstrap and typeahead combination
[#770] Added CSRF token for signing in
Merge pull request #851 from akvo/feature/770_v3_autocomplete

[#770] Sample suggestions box on projects listing page
[#843] Resolve merge conflicts with 'feature/rsr_v3' branch