0a4acd12c3, which fixes #160, introduced
a regression as it assumed only Client may implement StreamClient, and
passing a component triggers an unconditional "client is not
disconnected" error.

Support for XEP-0082.

Parsing of times with an offset does not work for now (should it ?)

Support for XEP-0334Support for XEP-0334 (Message Hints)

Fix issue #160

Close keepalive when recv() ends in client.go

Reset isSecure in StartTLS()

Stream Management

Remove "no depdencies" statement from README

Removed unnecessary dependencies from the core lib go.mod

As is apparent from the current go.mod file, this library definitely depends on various other libraries.
This in turn makes it depend on Go 1.13 (currently).

Various fixes

- Changed IQ stanzas to pointer semantics
- Fixed commands from v 0.4.0 and tests
- Added primitive Result Sets support (XEP-0059)
- Tests for Result sets are not implemented yet. Result sets seem to be fairly unused across servers and is a little weird to test without a specific implementing XEP like XEP-0313; because the implementations are different across XEPs. Therefore, as 313 is coming, I'll update the tests for XEP-0059 with it.

Will come with MaM (XEP-313) implementation

- Fixed commands from v 0.4.0 and tests
- Added primitive Result Sets support (XEP-0059)

Pub sub example update

Added README.md to PubSub client example

PubSub example

* PubSub protocol support
Added support for :
- XEP-0050   (Command))
- XEP-0060   (PubSub)
- XEP-0004   (Forms)

Fixed the NewClient function by adding parsing of the domain from the JID if no domain is provided in transport config.
Updated xmpp_jukebox example

* Delete useless pubsub errors

* README.md update
Fixed import in echo example

* Typo

* Fixed raw send on client example

* Fixed jukebox example and added a README.md

* Changelog v0.4.0

* PubSub protocol support
Added support for :
- XEP-0050   (Command))
- XEP-0060   (PubSub)
- XEP-0004   (Forms)

Fixed the NewClient function by adding parsing of the domain from the JID if no domain is provided in transport config.
Updated xmpp_jukebox example

* Delete useless pubsub errors

* README.md update
Fixed import in echo example

* Typo

* Fixed raw send on client example

* Fixed jukebox example and added a README.md

Updated example with a README.md and fixed some logs.

Remove wrong stanza sends

Quickfix : go back to menu when contacts are updated from server.

Added roster update to chat client example