changed symfony version 

device token error management 

Add image-type, image and notId fields for Android 

Additional Fields feature 

updated changelog for v0.1.6 

add test on UserDevice -> has to accept push notifications 

new configuration option in config.yml : apns_server, apns_topic, gcm… …_server, all with default values

added payload body features : category, ledColor, actions; debug log … …payload; payload generation support null values

Catch and log curl errors 

find return something :)