JS Client: Add websocket support

[turtleDev]

• Adds support for Websocket protocol in Javascript Client.
• User can pass in options.protocol as ws to request websocket protocol. (defaults to rest)
• Client is now a subclass of EventEmitter. When ws protocol is enabled, the client emits an ack event for every server response.
• Updated user documentation to add details about Websocket support

[coveralls]

Pull Request Test Coverage Report for Build 11218539072

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 81.269%

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Totals
Change from base Build 10996506167:	0.0%
Covered Lines:	1896
Relevant Lines:	2333

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💛 - Coveralls