Create compiler to ship insulin.phar

This reduces the amount of code to download for SugarCRM developers that
won't work with our code (aka consumers only).

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes

- [ ] remove PSR-4 compliant commit (is tracked by PR #59).