add user bundle
base dev configuration
init exam bundle
do not track bak file
simple style login form
category and fixtures
init fosrestbundle and category first service
complete api category
add nelmio api doc
question and single table inheritance
init questions controller
serialize according to discriminator
 question and item validation
add some fixtures
create a question webservice
enable max depth in jms serializer
manage different format in question form type for categories field
some unit testing
question patch, put and delete
add exam entities