Using current Alchemy version for Rails app template.
Focus the create language tree button.
Fix sprockets version to fix compass-rails issues

This fixes the "wrong number of arguments" error from latest compass-rails 2.0.1 used together with sprockets 2.12.3.

See: https://github.com/Compass/compass-rails/issues/195
Use alchemy-devise 2.1 beta in Rails app template
v3.1.0.beta3