Move _getVoice logic to _presentObject and make it work better with the new speech generator.  Also eliminate the upper case voice decision since that should be done elsewhere (i.e., deeper in the stack).
Move _getVoice logic to _presentObject and make it work better with
the new speech generator.  Also eliminate the upper case voice decision
since that should be done elsewhere (i.e., deeper in the stack).

h4ck3rm1k3/orca-sonar,pvagner/orca,h4ck3rm1k3/orca-sonar,pvagner/orca,pvagner/orca,chrys87/orca-beep,chrys87/orca-beep,GNOME/orca,chrys87/orca-beep,chrys87/orca-beep,GNOME/orca,GNOME/orca,pvagner/orca,GNOME/orca,h4ck3rm1k3/orca-sonar