Make --addressing an extension, not deprecated

Fixes TOOLS-169
Print previous, current states when terminating

This requires boto 2.6 or a patched version that includes the fix that
appears in boto commit a23c379 due to boto bug 889.  When that fix is
not present the tool will fall back to the old output format that does
not include instance states.

Fixes TOOLS-109
Print previous, current states when stopping

This requires boto 2.6 or a patched version that includes the fix that
appears in boto commit a23c379 due to boto bug 889.  When that fix is
not present the tool will fall back to the old output format that does
not include instance states.

Fixes TOOLS-176
Print previous, current states when starting

This requires boto 2.6 or a patched version that includes the fix that
appears in boto commit a23c379 due to boto bug 889.  When that fix is
not present the tool will fall back to the old output format that does
not include instance states.

Fixes TOOLS-175
Don't print anything from euca-reboot-instances

Fixes TOOLS-171