build deps: rubygems est morte; vive le ruby1.9.1

Signed-off-by: Dan Mick <dan.mick@inktank.com>
Apparently bower 1.2.8 can't handle git anymore (?)

Signed-off-by: Dan Mick <dan.mick@inktank.com>
Shut the new bower up about collecting stats

Signed-off-by: Dan Mick <dan.mick@inktank.com>