Server: udpate async to 2.0.0

package.json

server/controllers/api/v1/pods.js

server/controllers/api/v1/remote.js

server/controllers/api/v1/videos.js

server/initializers/installer.js

server/lib/friends.js

server/models/request.js

server/models/video.js

server/tests/api/checkParams.js

server/tests/api/friendsAdvanced.js

server/tests/api/friendsBasic.js

server/tests/api/multiplePods.js

server/tests/api/singlePod.js

server/tests/api/users.js

server/tests/real-world/real-world.js