Support namespace declarations on node elements and typed node elements

[matthiaspalmer]

Previous fixes only worked for namespace declarations on property elements.
Due to the striped syntax this was not enough.

Introduced test (and fix) for node elements and typed node elements.
Also divided the tests so there are separate tests for default namespace and specific namespace declarations.

[rubensworks]

Thanks for the PR @matthiaspalmer.
It looks like there's a merge conflict though. Could you rebase your branch onto master?

[coveralls]

Pull Request Test Coverage Report for Build 6967271401

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 6786033247:	0.0%
Covered Lines:	297
Relevant Lines:	297

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💛 - Coveralls

[matthiaspalmer]

Of course @rubensworks!
Should have done that from the start.
It is done now.

[rubensworks]

Thanks! Released as 2.4.0.