[Plugin] #10 + created PluginInterface and PluginManager to handle toolbar's plugins
[Controller] #9 + added ConfigController and 'bundle.toolbar.get_config' route
[Global] + updated php files licence
+ added basics files for PHPUnit tests
[Plugin] + added tests for PluginManager
[Controller] + added tests for ConfigController
[Plugin] - removed not necessary PHPUnit annotation from PluginManagerTest
Merge pull request #11 from backbee/10

[Plugin] Create plugin engine on Php side for JS close #10 close #9