Merge branch '2.0' into 2.1

# Conflicts:
#	CHANGELOG.md
#	app/Application.php
#	composer.json
#	package.json
#	packages/slimkit-plus-appversion/composer.json
#	packages/slimkit-plus-around-amap/composer.json
#	packages/slimkit-plus-checkin/composer.json
#	packages/slimkit-plus-feed/composer.json
#	packages/slimkit-plus-id/composer.json
#	packages/slimkit-plus-music/composer.json
#	packages/slimkit-plus-news/composer.json
#	packages/slimkit-plus-socialite/composer.json