minor #114 Added documentation about how to use custom DBAL types (javiereguiluz)
minor #114 Added documentation about how to use custom DBAL types (javiereguiluz)

This PR was squashed before being merged into the master branch (closes #114).

Discussion
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Added documentation about how to use custom DBAL types

Related discussion: #82

Commits
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b1b7919 Added documentation about how to use custom DBAL types

alexgt9/EasyAdminBundle,yceruto/EasyAdminBundle,gabiudrescu/EasyAdminBundle,alexgt9/EasyAdminBundle,gabiudrescu/EasyAdminBundle,thomasbeaujean/EasyAdminBundle,thomasbeaujean/EasyAdminBundle,gabiudrescu/EasyAdminBundle,OskarStark/EasyAdminBundle,seydu/EasyAdminBundle,seydu/EasyAdminBundle,Seanmcn/EasyAdminBundle,javiereguiluz/EasyAdminBundle,seydu/EasyAdminBundle,yceruto/EasyAdminBundle,datagit/EasyAdminBundle,kamilZ/EasyAdminBundle,thomasbeaujean/EasyAdminBundle,kamilZ/EasyAdminBundle,kamilZ/EasyAdminBundle,ogizanagi/EasyAdminBundle,yceruto/EasyAdminBundle,datagit/EasyAdminBundle,ogizanagi/EasyAdminBundle,ogizanagi/EasyAdminBundle,javiereguiluz/EasyAdminBundle,ogizanagi/EasyAdminBundle,OskarStark/EasyAdminBundle,alexgt9/EasyAdminBundle,npotier/EasyAdminBundle,npotier/EasyAdminBundle,datagit/EasyAdminBundle,peterkokot/EasyAdminBundle,OskarStark/EasyAdminBundle