minor #258 bundle autoloading moved to PSR4 (cordoval)
minor #258 bundle autoloading moved to PSR4 (cordoval)

This PR was squashed before being merged into the 3.0-dev branch (closes #258).

Discussion
----------

bundle autoloading moved to PSR4

|Q            |A   |
|---          |--- |
|Bug Fix?     |yes |
|New Feature? |no  |
|BC Breaks?   |no  |
|Deprecations?|no  |
|Tests Pass?  |yes |
|Fixed Tickets|#250|
|License      |MIT |
|Doc PR       |    |

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Commits
-------

fad6075 bundle autoloading moved to PSR4

Soullivaneuh/DoctrineMongoDBBundle,alcaeus/DoctrineMongoDBBundle,stof/DoctrineMongoDBBundle,tomasbro/DoctrineMongoDBBundle,sarcher/DoctrineMongoDBBundle,malarzm/DoctrineMongoDBBundle,0mars/DoctrineMongoDBBundle,jahller/DoctrineMongoDBBundle,juchi/DoctrineMongoDBBundle,alcaeus/DoctrineMongoDBBundle,castarco/DoctrineMongoDBBundle,doctrine/DoctrineMongoDBBundle,castarco/DoctrineMongoDBBundle,malarzm/DoctrineMongoDBBundle,jahller/DoctrineMongoDBBundle,Soullivaneuh/DoctrineMongoDBBundle,tomasbro/DoctrineMongoDBBundle,0mars/DoctrineMongoDBBundle,juchi/DoctrineMongoDBBundle