version for symfony 2.* not usable - api key

[grekpg]

I use dev-master version for symfony 2.8 - now dev-master is for 3.* symfony.
How i can setup maps api key ? (now google maps not work without key)

[xmon]

In my fork this is possible, https://github.com/xmon/OhGoogleMapFormTypeBundle.

I create a pull request but it isn't merge yet, since last updates appears some conflicts with my pull request. ollieLtd#17

I use my fork in 3 differents projects, and works like a charm.

I hope this helps.

[ollietb]

@grekpg ive updated the composer requirements