v0.5.0.
Added mixed and weird pubsub tests for (p)unsubscriptions without arguments.
Updated bilanx to v0.5.0, added full support for (P)UNSUBSCRIBE without arguments.
Added isUnsubscription and isPunsubscription properties to encoded (P)UNSUBSCRIBE
commands to support new Bilanx version.
On branch master
modified:   Readme.md
modified:   lib/commands/connection.js
modified:   lib/commands/pubsub.js
modified:   package.json
renamed:    test/pubsub-mixed-(p)unsubscribe-test.js -> test/pubsub-mode-mixed-punsubscribe-test.js
new file:   test/pubsub-mode-mixed-unsubscribe-test_.js
modified:   test/pubsub-mode-multiple-sub-multiple-unsub-test.js
modified:   test/pubsub-mode-offline-test.js
new file:   test/pubsub-mode-ping-test.js
modified:   test/pubsub-mode-subscribe-offline-unsubscribe-all-test.js
modified:   test/pubsub-mode-subscribe-test.js
modified:   test/pubsub-mode-test.js