Re-work the documentation index.
Re-work the documentation index.

Make the index just a table of contents by making the sections at the
top level. Shuffled some contents around to more appropriate sections.

Change-Id: Ifba248c68424fa41ffbcba683366d11f27ab6aaf

supriyantomaftuh/gerrit,hdost/gerrit,thesamet/gerrit,pkdevbox/gerrit,pkdevbox/gerrit,Team-OctOS/host_gerrit,Team-OctOS/host_gerrit,supriyantomaftuh/gerrit,gerrit-review/gerrit,WANdisco/gerrit,anminhsu/gerrit,quyixia/gerrit,quyixia/gerrit,MerritCR/merrit,midnightradio/gerrit,joshuawilson/merrit,MerritCR/merrit,thinkernel/gerrit,gcoders/gerrit,joshuawilson/merrit,GerritCodeReview/gerrit,midnightradio/gerrit,GerritCodeReview/gerrit,renchaorevee/gerrit,gerrit-review/gerrit,Distrotech/gerrit,joshuawilson/merrit,Saulis/gerrit,qtproject/qtqa-gerrit,joshuawilson/merrit,Team-OctOS/host_gerrit,GerritCodeReview/gerrit,anminhsu/gerrit,thinkernel/gerrit,thesamet/gerrit,joshuawilson/merrit,thesamet/gerrit,hdost/gerrit,MerritCR/merrit,WANdisco/gerrit,dwhipstock/gerrit,TonyChai24/test,bootstraponline-archive/gerrit-mirror,renchaorevee/gerrit,gcoders/gerrit,gcoders/gerrit,midnightradio/gerrit,Overruler/gerrit,thinkernel/gerrit,joshuawilson/merrit,Overruler/gerrit,gcoders/gerrit,anminhsu/gerrit,pkdevbox/gerrit,gcoders/gerrit,qtproject/qtqa-gerrit,anminhsu/gerrit,TonyChai24/test,hdost/gerrit,MerritCR/merrit,qtproject/qtqa-gerrit,bpollack/gerrit,thinkernel/gerrit,Seinlin/gerrit,GerritCodeReview/gerrit,bootstraponline-archive/gerrit-mirror,thinkernel/gerrit,jackminicloud/test,MerritCR/merrit,Team-OctOS/host_gerrit,Seinlin/gerrit,thinkernel/gerrit,WANdisco/gerrit,quyixia/gerrit,jackminicloud/test,thesamet/gerrit,renchaorevee/gerrit,Saulis/gerrit,quyixia/gerrit,pkdevbox/gerrit,GerritCodeReview/gerrit,Distrotech/gerrit,midnightradio/gerrit,dwhipstock/gerrit,Distrotech/gerrit,Seinlin/gerrit,quyixia/gerrit,jackminicloud/test,bpollack/gerrit,MerritCR/merrit,gcoders/gerrit,Seinlin/gerrit,anminhsu/gerrit,dwhipstock/gerrit,midnightradio/gerrit,hdost/gerrit,jackminicloud/test,Overruler/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,Saulis/gerrit,Distrotech/gerrit,thesamet/gerrit,supriyantomaftuh/gerrit,anminhsu/gerrit,qtproject/qtqa-gerrit,bootstraponline-archive/gerrit-mirror,dwhipstock/gerrit,thesamet/gerrit,gerrit-review/gerrit,supriyantomaftuh/gerrit,hdost/gerrit,netroby/gerrit,Saulis/gerrit,Distrotech/gerrit,netroby/gerrit,Team-OctOS/host_gerrit,pkdevbox/gerrit,thesamet/gerrit,netroby/gerrit,MerritCR/merrit,bootstraponline-archive/gerrit-mirror,supriyantomaftuh/gerrit,bpollack/gerrit,quyixia/gerrit,WANdisco/gerrit,jackminicloud/test,Saulis/gerrit,quyixia/gerrit,Seinlin/gerrit,hdost/gerrit,TonyChai24/test,Overruler/gerrit,Overruler/gerrit,qtproject/qtqa-gerrit,netroby/gerrit,joshuawilson/merrit,joshuawilson/merrit,Distrotech/gerrit,netroby/gerrit,bpollack/gerrit,jackminicloud/test,TonyChai24/test,renchaorevee/gerrit,dwhipstock/gerrit,Distrotech/gerrit,qtproject/qtqa-gerrit,Overruler/gerrit,netroby/gerrit,WANdisco/gerrit,hdost/gerrit,gerrit-review/gerrit,pkdevbox/gerrit,Seinlin/gerrit,TonyChai24/test,netroby/gerrit,Saulis/gerrit,GerritCodeReview/gerrit,thinkernel/gerrit,pkdevbox/gerrit,bootstraponline-archive/gerrit-mirror,Seinlin/gerrit,renchaorevee/gerrit,supriyantomaftuh/gerrit,bootstraponline-archive/gerrit-mirror,midnightradio/gerrit,anminhsu/gerrit,bpollack/gerrit,jackminicloud/test,Team-OctOS/host_gerrit,Team-OctOS/host_gerrit,MerritCR/merrit,TonyChai24/test,WANdisco/gerrit,dwhipstock/gerrit,gcoders/gerrit,renchaorevee/gerrit,renchaorevee/gerrit,gerrit-review/gerrit,dwhipstock/gerrit,WANdisco/gerrit,TonyChai24/test,GerritCodeReview/gerrit,bpollack/gerrit,gerrit-review/gerrit,gerrit-review/gerrit,supriyantomaftuh/gerrit