More RX way used internal library, more concurrent safe

Thanks @drstranges and @forresthopkinsa for contributions and great ideas used in this release.

Breaking changes:

• changed Stomp.over signature (see example-client module)

New features:

• wildcards support for RabbitMQ (see StompClient.setParser)
• support for subscribe disconnect completed (see ``StompClient.disconnectCompletable)

Fix memory leaks (clear subscriptions)

1.4.5

Fix memory leaks (clear subscriptions)

Fix ConcurrentModificationException

1.4.4

Fix concurrent modification exception

Fix NPE on dispose

Merge pull request #83 from steviemo/npe-on-dispose

Npe on dispose

Improvements and bug fixes

1.4.2

Fix disposable leak

Fix NPE when unsubscribe from lifecycle and emit lifecycle event in one time

1.4.1

Fix NPE when unsubscribe from lifecycle and emit lifecycle event in o…

Migrate to RxJava 2

Merge pull request #54 from hardyeats/rxjava2

Issue #48 : Convert from RxJava 1 to RxJava 2.

Use concurrent list instead ArrayList for deferred subscribers

Fix errors on API 25+

Suppport for okhttp.WebSocket connection provider

Thanks https://github.com/flolom

Fix ConcurrentModificationException when unsubscribe 2 or more subscribers at once

Merge pull request #43 from lmorda/master

Issue #40 - Unsubscribing a list of subscriptions causes ConcurrentModificationException