Docstrings and expose paho client (#35)

* Messaging.py; new paho_client public prop. to return __mqttc

* docstrings for public methods

* README; added documentation on 'paho-mqtt' attribute

* 'attribute' ->  'public attribute'

* Added colons

* setup.py; 2.4.6 -> 2.4.7

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Co-authored-by: sky-sharma <[email protected]>

setup.py; ver 2.4.5 -> 2.4.6 (#34)

Co-authored-by: sky-sharma <[email protected]>

setup.py; 2.4.3 -> 2.4.4

Merge pull request #21 from ClearBlade/develop

merge clean_session from develop to master

Removed file that was inadvertently added to dist.

Changed version from 2.4.1 to 2.4.2

Merge branch 'master' of https://github.com/ClearBlade/Python-API

Version 2.3.0 -> 2.4.0

Version 2.3.1 Release

Version 2.3.0 Release

auto generate client id if not given