Document printt's removal about prettytable HOT 3 CLOSED

I can't try out openstack-compute because of this change. Is it possible to add 
printt back?

@George.V.Reilly: Thanks for pointing this out, you are right that an update to 
the tutorials is long overdue.  I'll try to get this fixed up a bit today.

@tonybr777: Sorry, but I decided to remove printt for good reason: as long as 
there exists a method to fetch a string of a table (and there always should be 
such a method, so that people can e.g. save tables to files) then having a 
dedicated printing method is entirely redundant since Python has inbuilt 
printing functions that can be used to print the string.  Printt was also an 
obstacle to Python3 compatibility, since the inbuilt printing function is 
different in 2.x and 3.x.  Getting rid of printt improved and simplified the 
overall API, and adding it back would be a backward step.

If you need to try out some software that makes use of printt, your best 
options are to either install PrettyTable 0.5 (with e.g. "easy_install 
PrettyTable==0.5") and just use that, or to update the software to no longer 
use printt.  It looks like openstack-compute only uses printt in two places, in 
the file openstack.compute/openstack/compute/shell.py, so this should be very 
easy.  Just replace "pt.printt(**kwargs)" with "print pt.get_string(**kwargs)" 
for 2.x or "print(pt.get_string(**kwargs)" for 3.x.

Today, after releasing 0.7, I have deleted the old Tutorial0.6 wiki page, and 
updated the Tutorial wiki page.  The Tutorial page now has no references to 
printt, and none of the examples do things "the old way".  So finally it should 
be impossible for anybody to get confused in the future.  Therefore I'm closing 
this issue.