Add NAS Applications configuration changes - 1st go

Modified tools/cronjobs.py - webtrends endpoint points to correct datagroup: nas-applications
Initial collector configurations for:
  queries/nas-applications/browser-count.json
  queries/nas-applications/journey-apply.json
  queries/nas-applications/journey-profile.json
  queries/nas-applications/journey-registration.json
  queries/nas-applications/journey-search.json
  queries/nas-applications/journey-security.json
  queries/nas-applications/os-count.json
  queries/nas-applications/site-use.json
Updated cronjobs
  all collectors EXCEPT site-use run daily
  site-use runs hourly
Merge pull request #61 from alphagov/Add-nas-applications-configs

Add NAS Applications configuration changes - 1st go