Upgrade to the latest rbt release.
Upgrade to the latest rbt release.

This picks up speed fixes (less API calls) and the new login and logout
subcommands.

See the intervening release notes since 0.7:
+ 0.7.1 http://blog.rbcommons.com/2015/02/04/rbtools-0-7-1-is-released/
+ 0.7.2 http://blog.rbcommons.com/2015/03/09/rbtools-0-7-2-is-here/

Testing Done:
I used 0.7.2 to post this RB.

CI went green here:
  https://travis-ci.org/pantsbuild/pants/builds/53746083

Bugs closed: 1231

Reviewed at https://rbcommons.com/s/twitter/r/1893/

mateor/pants,foursquare/pants,pombredanne/pants,landism/pants,cevaris/pants,areitz/pants,laurentgo/pants,foursquare/pants,benjyw/pants,sid-kap/pants,dgomez10/xanon,pgroudas/pants,ity/pants,gmalmquist/pants,manasapte/pants,gmalmquist/pants,baroquebobcat/pants,digwanderlust/pants,kwlzn/pants,digwanderlust/pants,foursquare/pants,ericzundel/pants,pantsbuild/pants,TansyArron/pants,cevaris/pants,mateor/pants,foursquare/pants,landism/pants,scode/pants,benjyw/pants,tdyas/pants,sameerparekh/pants,ity/pants,manasapte/pants,pgroudas/pants,pantsbuild/pants,peiyuwang/pants,scode/pants,ity/pants,cevaris/pants,sameerparekh/pants,pombredanne/pants,foursquare/pants,dgomez10/xanon,pombredanne/pants,sameerparekh/pants,TansyArron/pants,slyphon/pants,UnrememberMe/pants,kslundberg/pants,baroquebobcat/pants,sid-kap/pants,tdyas/pants,15Dkatz/pants,twitter/pants,dbentley/pants,peiyuwang/pants,baroquebobcat/pants,foursquare/pants,qma/pants,lahosken/pants,wisechengyi/pants,digwanderlust/pants,manasapte/pants,lahosken/pants,laurentgo/pants,ity/pants,landism/pants,gmalmquist/pants,Gabriel439/pants,peiyuwang/pants,areitz/pants,fkorotkov/pants,wisechengyi/pants,sid-kap/pants,UnrememberMe/pants,benjyw/pants,UnrememberMe/pants,jessrosenfield/pants,scode/pants,sid-kap/pants,foursquare/pants,gmalmquist/pants,dbentley/pants,kslundberg/pants,qma/pants,jtrobec/pants,foursquare/pants,wisechengyi/pants,di0spyr0s/pants,pombredanne/pants,dgomez10/xanon,benjyw/pants,foursquare/pants,ity/pants,jtrobec/pants,mateor/pants,dturner-tw/pants,mateor/pants,fkorotkov/pants,scode/pants,slyphon/pants,manasapte/pants,twitter/pants,digwanderlust/pants,twitter/pants,dgomez10/xanon,fkorotkov/pants,tdyas/pants,dturner-tw/pants,landism/pants,sid-kap/pants,jessrosenfield/pants,fkorotkov/pants,mateor/pants,tdyas/pants,digwanderlust/pants,twitter/pants,jtrobec/pants,areitz/pants,mateor/pants,15Dkatz/pants,ericzundel/pants,baroquebobcat/pants,tdyas/pants,digwanderlust/pants,lahosken/pants,TansyArron/pants,jsirois/pants,gmalmquist/pants,megaserg/pants,UnrememberMe/pants,ericzundel/pants,15Dkatz/pants,benjyw/pants,pombredanne/pants,manasapte/pants,qma/pants,di0spyr0s/pants,wisechengyi/pants,mateor/pants,lahosken/pants,sameerparekh/pants,megaserg/pants,fkorotkov/pants,pgroudas/pants,di0spyr0s/pants,jtrobec/pants,sameerparekh/pants,megaserg/pants,di0spyr0s/pants,jtrobec/pants,benjyw/pants,slyphon/pants,TansyArron/pants,pantsbuild/pants,dturner-tw/pants,ity/pants,kwlzn/pants,dgomez10/xanon,UnrememberMe/pants,pantsbuild/pants,dgomez10/xanon,Gabriel439/pants,Gabriel439/pants,areitz/pants,cevaris/pants,wisechengyi/pants,sid-kap/pants,baroquebobcat/pants,baroquebobcat/pants,areitz/pants,qma/pants,kslundberg/pants,Gabriel439/pants,scode/pants,slyphon/pants,gmalmquist/pants,sid-kap/pants,pantsbuild/pants,twitter/pants,wisechengyi/pants,pombredanne/pants,cevaris/pants,tdyas/pants,jtrobec/pants,kslundberg/pants,dbentley/pants,lahosken/pants,UnrememberMe/pants,tdyas/pants,TansyArron/pants,tdyas/pants,gmalmquist/pants,megaserg/pants,sameerparekh/pants,dbentley/pants,peiyuwang/pants,15Dkatz/pants,di0spyr0s/pants,benjyw/pants,di0spyr0s/pants,15Dkatz/pants,pgroudas/pants,twitter/pants,15Dkatz/pants,15Dkatz/pants,lahosken/pants,slyphon/pants,kwlzn/pants,ericzundel/pants,Gabriel439/pants,cevaris/pants,jessrosenfield/pants,qma/pants,pantsbuild/pants,dbentley/pants,manasapte/pants,TansyArron/pants,di0spyr0s/pants,tdyas/pants,laurentgo/pants,qma/pants,kslundberg/pants,ity/pants,manasapte/pants,dturner-tw/pants,jessrosenfield/pants,jessrosenfield/pants,wisechengyi/pants,landism/pants,ericzundel/pants,dbentley/pants,baroquebobcat/pants,kslundberg/pants,twitter/pants,kwlzn/pants,dbentley/pants,jessrosenfield/pants,Gabriel439/pants,wisechengyi/pants,ericzundel/pants,twitter/pants,15Dkatz/pants,cevaris/pants,sameerparekh/pants,kwlzn/pants,ericzundel/pants,peiyuwang/pants,fkorotkov/pants,kslundberg/pants,qma/pants,baroquebobcat/pants,landism/pants,pantsbuild/pants,laurentgo/pants,lahosken/pants,dgomez10/xanon,laurentgo/pants,megaserg/pants,areitz/pants,wisechengyi/pants,dturner-tw/pants,laurentgo/pants,mateor/pants,jtrobec/pants,areitz/pants,TansyArron/pants,fkorotkov/pants,scode/pants,dgomez10/xanon,UnrememberMe/pants,ericzundel/pants,Gabriel439/pants,dgomez10/xanon,kwlzn/pants,UnrememberMe/pants,landism/pants,peiyuwang/pants,peiyuwang/pants,jsirois/pants,slyphon/pants,dturner-tw/pants,jessrosenfield/pants,baroquebobcat/pants,pombredanne/pants,peiyuwang/pants,pgroudas/pants,pgroudas/pants,megaserg/pants,dturner-tw/pants,kwlzn/pants,jsirois/pants,scode/pants,fkorotkov/pants,UnrememberMe/pants,dgomez10/xanon,megaserg/pants,twitter/pants,dgomez10/xanon,lahosken/pants,slyphon/pants,landism/pants