Fix unit tests
Exclude fallback paths when compiling with r.js, as they don't make sense for compilation purposes and cause r.js to choke
Disable the JavaScript compressor in a configuration block

Fixes #5. Thanks @grahamlyus!
Update the gem version to `0.9.2`
Fix ruby rake task signature
Set `env.js_compressor = false` for Rails 3.2 backwards compatibility

Credit @jnu.
Remove an extraneous RequireJS optimizer invocation

Credit @jnu.
Remove the Rails version < 4.1 restriction
Update requirejs to 2.1.11 and almond to 0.2.9