Added replace(",", ".") in the readGamry function

[SaftMacki]

Added the possibility for the readGamry function to read Gamry files that uses comma for decimal separator.

[coveralls]

Pull Request Test Coverage Report for Build 3294185429

• 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 3294154090:	0.0%
Covered Lines:	842
Relevant Lines:	842

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💛 - Coveralls