Feature build iOS apps on Travis

[RedTo]

Implemented the possibility to build IPAs -> iOS App - Files on Travis. Now we can check if building on iOS is also working.

[RedTo]

Corresponding issue: #187

[coveralls]

Pull Request Test Coverage Report for Build 565

• 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 74.794%

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Totals
Change from base Build 560:	0.0%
Covered Lines:	1178
Relevant Lines:	1575

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💛 - Coveralls