Always return jQuery in modules that can be included separately

Conflicts:
	src/attributes.js
	src/data.js
	src/manipulation.js
Keep the build for bower
Revert "Keep the build for bower"

This reverts commit c9858a4351c0c04aa1786b01ca1dfef84412dcf9.
Restore optIn behavior for builds

Conflicts:
	build/tasks/build.js