gitignore, some enhancements
Merge branch 'master' of https://github.com/andreaspfurtscheller/cube

Conflicts:
	app/controllers/APIPluginController.php
	app/storage/temp/2018d3097740dfa8a08b93d707e0b5cd/CubeQR/vendor/aferrandini/phpqrcode/.gitignore
	app/storage/temp/230136d85316e5b55cab21e72c9196ed/CubeQR/vendor/aferrandini/phpqrcode/.gitignore
	app/storage/temp/4368fd98b910387d114dc3a57e02cc23/CubeQR/vendor/aferrandini/phpqrcode/.gitignore
	app/storage/temp/447381fcb6e6cab2d659d7f36a826a68/CubeQR/vendor/aferrandini/phpqrcode/.gitignore
	app/storage/temp/502637c86fbf3f81a01b6dc2cf27c273/CubeQR/vendor/aferrandini/phpqrcode/.gitignore
	app/storage/temp/76dd40948fe8e94c281ea7a197c5abbf/CubeQR/vendor/aferrandini/phpqrcode/.gitignore
	app/storage/temp/c228f5a467dbfe16c4504c89b5ee62f7/CubeQR/vendor/aferrandini/phpqrcode/.gitignore
	app/storage/temp/e6cfc1de435d88940002c5297bad893b/CubeQR/vendor/aferrandini/phpqrcode/.gitignore
	workbench/cube/cube/src/Cube/Cube/PluginManager.php