Update for manual pages

- CSS updated
- update HTML structure for ZF1 manual
- update navigation for ZF1 manual
Minor change to manual source location

- Changes introduced allow us to use the standalone HTML docs instead of
  requiring the generated view scripts.
  - Modified the production source location and how the versions are mapped
  - No longer need to replace '.html' with '.phtml'
Merge branch 'feature/68' into develop

Close #68