Seo presentation fix

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no idea
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #33, #28 btw #30  
| License       | MIT
| Doc PR        | [The reference to the documentation PR if any]

So....
@WouterJ

This is my first PR on an own bundle let you review my changes, the only thing i have to do with this stuff is: creating an configuration for handling that locale depending `cmf_seo.title.default.en: ... `or `cmf_seo.title.default: ...`