Remove '/index' part for doc_subitem

Otherwise in ``aws help`` you get ``ec2/index``
as the service names under the Available Service
section.
Add '/index' for tocitem with html target
Merge branch 'remove-index' into develop

* remove-index:
  Add '/index' for tocitem with html target
  Remove '/index' part for doc_subitem
Slight tweak to the handling of toclinks.  Sometimes we need the /index and sometimes we don't, depending on the structure of our output.  The previous fix was including it everywhere.
Bumping version to 0.5.0
Merge branch 'release-0.5.0' into develop

* release-0.5.0:
  Bumping version to 0.5.0
Match the style of input JSON to the style used in output.  Fixes awscli issue 187.