Support passing codec parameters when creating publishers.

[fancycode]

Finally implements #79

[coveralls]

Pull Request Test Coverage Report for Build 11664327301

Details

• 84 of 175 (48.0%) changed or added relevant lines in 9 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.3%) to 59.824%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
mcu_janus_remote_publisher.go	0	1	0.0%
mcu_janus_remote_subscriber.go	0	1	0.0%
mcu_common.go	24	27	88.89%
mcu_janus_publisher.go	0	5	0.0%
mcu_janus_subscriber.go	0	5	0.0%
mcu_proxy.go	38	56	67.86%
mcu_janus.go	0	58	0.0%

Files with Coverage Reduction	New Missed Lines	%
client.go	2	74.86%
mcu_proxy.go	2	60.57%

Totals
Change from base Build 11654694528:	0.3%
Covered Lines:	11013
Relevant Lines:	18409

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💛 - Coveralls