Support braced hashlike on FromString as documented.

[itsjamie]

Fix #13.

[acln0]

LGTM. Waiting for @theckman to merge.

[coveralls]

Pull Request Test Coverage Report for Build 38

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.6%) to 98.137%

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Totals
Change from base Build 26:	0.6%
Covered Lines:	316
Relevant Lines:	322

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💛 - Coveralls

[theckman]

@itsjamie can you take a look at the coveralls report, and see if the tests can be tweaked to include the lines it claims aren't tested?

• https://coveralls.io/builds/17988515/source

It seems like codec.go is the one it's not happy with:

• https://coveralls.io/builds/17988515/source?filename=codec.go

[acln0]

@theckman I think this isn't a big deal. Some of the things missing were not covered before, and will be covered by my larger testing overhaul PR, which I can send soon. The relevant new code paths introduced by this patch are covered, so I think it's fine to merge it as-is. Your call.

[itsjamie]

I can submit a change to cover the FromBytesOrNil and FromStringOrNil success cases.

The default switch case in decodePlain that is uncovered can't be reached from public API (as far as I can tell). Which raises the question, unit test private implementation or only what can be reached from accessible APIs?

[theckman]

@itsjamie thank you for the extra effort to get the test coverage back up! That looks awesome!

While I'd generally prefer this as a single commit, I'll merge with the two commits attached.