documentation: Clean up pgm-index
documentation: Clean up pgm-index

Break out the utilities into their own section, and correct
some of the item descriptions.

Change-Id: Ic6f6b57eff3fdd6c58058bd9b36c9cfcbbb4b3c5

duboisf/gerrit,MerritCR/merrit,Team-OctOS/host_gerrit,evanchueng/gerrit,quyixia/gerrit,gcoders/gerrit,TonyChai24/test,bootstraponline-archive/gerrit-mirror,thinkernel/gerrit,keerath/gerrit_newssh,gracefullife/gerrit,keerath/gerrit_newssh,supriyantomaftuh/gerrit,MerritCR/merrit,pkdevbox/gerrit,Distrotech/gerrit,joshuawilson/merrit,joshuawilson/merrit,midnightradio/gerrit,netroby/gerrit,netroby/gerrit,bpollack/gerrit,renchaorevee/gerrit,hdost/gerrit,Team-OctOS/host_gerrit,quyixia/gerrit,bpollack/gerrit,quyixia/gerrit,TonyChai24/test,1yvT0s/gerrit,midnightradio/gerrit,GerritCodeReview/gerrit,Saulis/gerrit,Seinlin/gerrit,Overruler/gerrit,anminhsu/gerrit,qtproject/qtqa-gerrit,thesamet/gerrit,teamblueridge/gerrit,hdost/gerrit,teamblueridge/gerrit,catrope/gerrit,dwhipstock/gerrit,1yvT0s/gerrit,qtproject/qtqa-gerrit,1yvT0s/gerrit,jackminicloud/test,joshuawilson/merrit,pkdevbox/gerrit,Team-OctOS/host_gerrit,basilgor/gerrit,Seinlin/gerrit,renchaorevee/gerrit,Saulis/gerrit,Overruler/gerrit,zommarin/gerrit,jackminicloud/test,ckamm/gerrit,m1kah/gerrit-contributions,GerritCodeReview/gerrit,renchaorevee/gerrit,midnightradio/gerrit,catrope/gerrit,keerath/gerrit_newssh,ashang/aaron-gerrit,pkdevbox/gerrit,thinkernel/gerrit,dwhipstock/gerrit,qtproject/qtqa-gerrit,thesamet/gerrit,evanchueng/gerrit,ashang/aaron-gerrit,basilgor/gerrit,hdost/gerrit,thesamet/gerrit,qtproject/qtqa-gerrit,Distrotech/gerrit,bpollack/gerrit,jackminicloud/test,hdost/gerrit,thesamet/gerrit,bpollack/gerrit,pkdevbox/gerrit,CandyShop/gerrit,gcoders/gerrit,supriyantomaftuh/gerrit,hdost/gerrit,joshuawilson/merrit,ckamm/gerrit,CandyShop/gerrit,supriyantomaftuh/gerrit,anminhsu/gerrit,m1kah/gerrit-contributions,basilgor/gerrit,Distrotech/gerrit,gracefullife/gerrit,duboisf/gerrit,atdt/gerrit,bpollack/gerrit,Saulis/gerrit,GerritCodeReview/gerrit,renchaorevee/gerrit,WANdisco/gerrit,cjh1/gerrit,GerritCodeReview/gerrit,MerritCR/merrit,pkdevbox/gerrit,jackminicloud/test,pkdevbox/gerrit,qtproject/qtqa-gerrit,Overruler/gerrit,gerrit-review/gerrit,midnightradio/gerrit,zommarin/gerrit,anminhsu/gerrit,m1kah/gerrit-contributions,CandyShop/gerrit,evanchueng/gerrit,TonyChai24/test,atdt/gerrit,gcoders/gerrit,ckamm/gerrit,jackminicloud/test,cjh1/gerrit,Seinlin/gerrit,basilgor/gerrit,gracefullife/gerrit,MerritCR/merrit,renchaorevee/gerrit,netroby/gerrit,gracefullife/gerrit,supriyantomaftuh/gerrit,GerritCodeReview/gerrit,gcoders/gerrit,Seinlin/gerrit,WANdisco/gerrit,gerrit-review/gerrit,Distrotech/gerrit,Overruler/gerrit,thinkernel/gerrit,atdt/gerrit,dwhipstock/gerrit,qtproject/qtqa-gerrit,bootstraponline-archive/gerrit-mirror,WANdisco/gerrit,WANdisco/gerrit,dwhipstock/gerrit,quyixia/gerrit,WANdisco/gerrit,joshuawilson/merrit,renchaorevee/gerrit,Seinlin/gerrit,atdt/gerrit,evanchueng/gerrit,Team-OctOS/host_gerrit,keerath/gerrit_newssh,Distrotech/gerrit,cjh1/gerrit,dwhipstock/gerrit,netroby/gerrit,duboisf/gerrit,TonyChai24/test,bootstraponline-archive/gerrit-mirror,zommarin/gerrit,quyixia/gerrit,Overruler/gerrit,anminhsu/gerrit,gerrit-review/gerrit,anminhsu/gerrit,Distrotech/gerrit,thesamet/gerrit,renchaorevee/gerrit,anminhsu/gerrit,dwhipstock/gerrit,qtproject/qtqa-gerrit,catrope/gerrit,GerritCodeReview/gerrit,supriyantomaftuh/gerrit,ashang/aaron-gerrit,CandyShop/gerrit,dwhipstock/gerrit,netroby/gerrit,CandyShop/gerrit,MerritCR/merrit,thinkernel/gerrit,supriyantomaftuh/gerrit,MerritCR/merrit,MerritCR/merrit,jackminicloud/test,bootstraponline-archive/gerrit-mirror,quyixia/gerrit,WANdisco/gerrit,thinkernel/gerrit,anminhsu/gerrit,1yvT0s/gerrit,Saulis/gerrit,GerritCodeReview/gerrit,gcoders/gerrit,gcoders/gerrit,hdost/gerrit,gcoders/gerrit,joshuawilson/merrit,quyixia/gerrit,atdt/gerrit,midnightradio/gerrit,TonyChai24/test,teamblueridge/gerrit,evanchueng/gerrit,MerritCR/merrit,supriyantomaftuh/gerrit,midnightradio/gerrit,netroby/gerrit,Saulis/gerrit,joshuawilson/merrit,gerrit-review/gerrit,Seinlin/gerrit,Overruler/gerrit,netroby/gerrit,pkdevbox/gerrit,WANdisco/gerrit,gracefullife/gerrit,m1kah/gerrit-contributions,ashang/aaron-gerrit,Team-OctOS/host_gerrit,Distrotech/gerrit,hdost/gerrit,gerrit-review/gerrit,bpollack/gerrit,ckamm/gerrit,Seinlin/gerrit,duboisf/gerrit,jackminicloud/test,joshuawilson/merrit,Team-OctOS/host_gerrit,bootstraponline-archive/gerrit-mirror,gerrit-review/gerrit,1yvT0s/gerrit,Saulis/gerrit,thinkernel/gerrit,ashang/aaron-gerrit,ckamm/gerrit,teamblueridge/gerrit,basilgor/gerrit,TonyChai24/test,zommarin/gerrit,teamblueridge/gerrit,catrope/gerrit,TonyChai24/test,cjh1/gerrit,zommarin/gerrit,bootstraponline-archive/gerrit-mirror,gerrit-review/gerrit,thesamet/gerrit,Team-OctOS/host_gerrit,thesamet/gerrit,GerritCodeReview/gerrit,thinkernel/gerrit,keerath/gerrit_newssh