Update README.md

I tried to get this working on Mountain Lion so that I could contribute. I had some troubles with installing Qt. It seems the hash in the instructions may be an old one as well.
Documentation for Sphero support
A few improvement to text
A few more improvement to text
Adding the placeholders for es, fr, and ja translation of Sphero info
translate es/robots/index.html
translate es/robots/sphero.html
translate es/robots/sphero_commands.html
Upgrade fsevent so it's not deprecated version
Resolved #95
https://github.com/hybridgroup/kidsruby/issues/95
Merge pull request #97 from hybridgroup/95-fix-background-intro

95 fix background intro
Remove paragraph that does not match tutorial code
Merge branch 'master' of github.com:hybridgroup/kidsruby
Merge branch 'master' into sphero
Merge pull request #94 from rmcastil/master

Specify version of OSX in the Readme
Merge branch 'master' into sphero
Update to v1.3
translate Sphero help files in Japanese
Merge pull request #98 from silkycove/sphero

translate Sphero help files in Japanese
Merge branch 'sphero' of github.com:hybridgroup/kidsruby into sphero