Additional Option details for the Task developers guide
Additional Option details for the Task developers guide

Fixes for additional review feedback from https://rbcommons.com/s/twitter/r/2594/

- Describe `advanced`
- Describe `action` and its two most common usages.

Testing Done:
https://github.com/pantsbuild/pants/pull/1965

Reviewed at https://rbcommons.com/s/twitter/r/2612/

UnrememberMe/pants,scode/pants,qma/pants,mateor/pants,fkorotkov/pants,kwlzn/pants,slyphon/pants,wisechengyi/pants,jsirois/pants,scode/pants,UnrememberMe/pants,sid-kap/pants,fkorotkov/pants,benjyw/pants,kwlzn/pants,jsirois/pants,areitz/pants,UnrememberMe/pants,peiyuwang/pants,gmalmquist/pants,Gabriel439/pants,fkorotkov/pants,wisechengyi/pants,pantsbuild/pants,dbentley/pants,UnrememberMe/pants,lahosken/pants,benjyw/pants,pombredanne/pants,fkorotkov/pants,TansyArron/pants,cevaris/pants,jtrobec/pants,twitter/pants,jtrobec/pants,twitter/pants,benjyw/pants,landism/pants,wisechengyi/pants,cevaris/pants,slyphon/pants,gmalmquist/pants,foursquare/pants,qma/pants,Gabriel439/pants,megaserg/pants,fkorotkov/pants,twitter/pants,ity/pants,megaserg/pants,cevaris/pants,lahosken/pants,scode/pants,TansyArron/pants,jessrosenfield/pants,baroquebobcat/pants,slyphon/pants,pombredanne/pants,baroquebobcat/pants,TansyArron/pants,wisechengyi/pants,15Dkatz/pants,TansyArron/pants,twitter/pants,tdyas/pants,jessrosenfield/pants,pantsbuild/pants,slyphon/pants,jessrosenfield/pants,fkorotkov/pants,manasapte/pants,baroquebobcat/pants,cevaris/pants,landism/pants,di0spyr0s/pants,manasapte/pants,sameerparekh/pants,UnrememberMe/pants,Gabriel439/pants,dbentley/pants,TansyArron/pants,sid-kap/pants,tdyas/pants,dturner-tw/pants,foursquare/pants,kslundberg/pants,kslundberg/pants,manasapte/pants,peiyuwang/pants,jessrosenfield/pants,qma/pants,twitter/pants,dturner-tw/pants,manasapte/pants,kwlzn/pants,di0spyr0s/pants,dturner-tw/pants,pombredanne/pants,fkorotkov/pants,scode/pants,jtrobec/pants,jtrobec/pants,areitz/pants,kslundberg/pants,tdyas/pants,kwlzn/pants,jessrosenfield/pants,peiyuwang/pants,mateor/pants,ity/pants,ity/pants,pantsbuild/pants,lahosken/pants,landism/pants,foursquare/pants,TansyArron/pants,kwlzn/pants,dturner-tw/pants,sid-kap/pants,foursquare/pants,lahosken/pants,gmalmquist/pants,tdyas/pants,ity/pants,mateor/pants,kwlzn/pants,dturner-tw/pants,dturner-tw/pants,ity/pants,ity/pants,jtrobec/pants,ericzundel/pants,megaserg/pants,lahosken/pants,peiyuwang/pants,cevaris/pants,ericzundel/pants,twitter/pants,foursquare/pants,UnrememberMe/pants,landism/pants,baroquebobcat/pants,15Dkatz/pants,tdyas/pants,tdyas/pants,benjyw/pants,peiyuwang/pants,sameerparekh/pants,pombredanne/pants,ity/pants,jtrobec/pants,pombredanne/pants,ericzundel/pants,sameerparekh/pants,landism/pants,landism/pants,15Dkatz/pants,wisechengyi/pants,areitz/pants,mateor/pants,foursquare/pants,pantsbuild/pants,qma/pants,sid-kap/pants,foursquare/pants,TansyArron/pants,pantsbuild/pants,lahosken/pants,sameerparekh/pants,dturner-tw/pants,kslundberg/pants,wisechengyi/pants,qma/pants,landism/pants,jsirois/pants,15Dkatz/pants,Gabriel439/pants,wisechengyi/pants,jessrosenfield/pants,di0spyr0s/pants,sameerparekh/pants,areitz/pants,tdyas/pants,sid-kap/pants,jessrosenfield/pants,scode/pants,slyphon/pants,pombredanne/pants,tdyas/pants,slyphon/pants,megaserg/pants,15Dkatz/pants,baroquebobcat/pants,cevaris/pants,15Dkatz/pants,manasapte/pants,manasapte/pants,ericzundel/pants,UnrememberMe/pants,sameerparekh/pants,dbentley/pants,baroquebobcat/pants,di0spyr0s/pants,dbentley/pants,pombredanne/pants,ericzundel/pants,ericzundel/pants,kslundberg/pants,ericzundel/pants,benjyw/pants,qma/pants,baroquebobcat/pants,megaserg/pants,twitter/pants,areitz/pants,mateor/pants,peiyuwang/pants,dbentley/pants,peiyuwang/pants,areitz/pants,lahosken/pants,pantsbuild/pants,mateor/pants,landism/pants,cevaris/pants,gmalmquist/pants,qma/pants,sameerparekh/pants,foursquare/pants,sid-kap/pants,gmalmquist/pants,UnrememberMe/pants,kslundberg/pants,ericzundel/pants,megaserg/pants,dbentley/pants,tdyas/pants,15Dkatz/pants,benjyw/pants,scode/pants,scode/pants,kslundberg/pants,mateor/pants,baroquebobcat/pants,kwlzn/pants,sid-kap/pants,areitz/pants,lahosken/pants,fkorotkov/pants,twitter/pants,twitter/pants,jtrobec/pants,Gabriel439/pants,mateor/pants,manasapte/pants,wisechengyi/pants,foursquare/pants,megaserg/pants,baroquebobcat/pants,pantsbuild/pants,dbentley/pants,gmalmquist/pants,15Dkatz/pants,di0spyr0s/pants,peiyuwang/pants,gmalmquist/pants,benjyw/pants,Gabriel439/pants,di0spyr0s/pants,Gabriel439/pants,slyphon/pants,wisechengyi/pants,UnrememberMe/pants,di0spyr0s/pants