autocomplete=off on VAF to avoid onchange troubles

onchange does not get triggered on some browsers (Safari, IE) when
using the autocomplete feature. Turning it off to work around this
problem.
For VAF: automatic CVMFS proxy configuration
settings.ENABLE_WEBAPI and 'webapi' group are checked and an enable_webapi flag is set to the context
Adding class .buttons-container and .btn in the dashboard table and minor styling change
WebAPI VMs configurations list added
Dashboard integration with WebAPI and minor change in contexts list styling
Fixes colspan in case enable_webapi is true
Introducing the URL_PREFIX in all URLs and redirects of CVMO
Fixing Chrome error 'running insecure content from...'
Cookie path is set with respect to URL prefix
Whitespace
Bug fix for the sign URL genaration
Adds the cervn_appliance context section to new contexts
Merge branch 'master' into web-appliance-context
Fixes fatal error regarding {% load url from future %} missing from a template file
Merge branch 'master' into web-appliance-context
Merging master