[WIP] Select2 added, refs #95

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| Refs tickets  | #95
| License       | my code: MIT; select2: GPL/Apache2
| Doc PR        | -