Docs: File::encryptData and File::decryptData

[elliot-sawyer]

The latest version of Halite contains updated method names.

Consider removing these from the docs, as they're now protected rather than public

[coveralls]

Pull Request Test Coverage Report for Build 734

• 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 99.615%

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Totals
Change from base Build 731:	0.0%
Covered Lines:	1293
Relevant Lines:	1298

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💛 - Coveralls

[christiaan]

From what I see these fixes also are incorrect. The API is now File::encrypt and File::decrypt

[elliot-sawyer]

Good spotting @christiaan, that explains why the methods were protected! I've updated this pull request

[paragonie-scott]

Thanks! Good documentation is important for security and you made it materially better than it was before.