Fix using Javascript reserved keyword
Merge pull request #2959 from polmiro/fix-using-javascript-reserved-word

Fix using Javascript reserved keyword
allow Rails 4.1.x versions to be installed
Merge pull request #3115 from agrobbin/rails-4-1-1

allow Rails 4.1.x versions to be installed
test Rails 3.2.18
Use one-based indexing for sortable has_many
Add removable option to has_many form field

By default: show remove button

If removable: false then don't show the remove button