Print a message in the console if a profile cannot be parsed

[teone]

cov.parseProfile returns errors if something goes wrong, but they are not checked.
This will print a message containing the error.

I was going for a log.Fatal in case of an error but that would change the behavior of the tool.

[coveralls]

Pull Request Test Coverage Report for Build 37

• 1 of 3 (33.33%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.6%) to 79.114%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
gocover-cobertura.go	1	3	33.33%

Totals
Change from base Build 29:	-0.6%
Covered Lines:	250
Relevant Lines:	316

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💛 - Coveralls