Setup CI/CD For supported platforms

[ghost]

Setup CI/CD (Jenkins) For supported platforms:

• Linux
• OS X
• Windows

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Upd. Status: Waiting developers getting ready for CI.

[roman-modelist-dev]

array-io-core repo has been added into array-io-keychain as submodule.
Also I configured cmake to automaticaly build array-io-core dependencies and link it into array-io-keychain binaries.

Finally:
To build array-io-keychain on linux and macos it need:

• to git clone with submodules array-io-keychain repo
• run cmake in build directory with -G "Unix Makefiles" (it may need to define BOOST_ROOT and OPENSSL_ROOT_DIR variables to specify dependencies locations)

To build array-io-keychain on windows it need:

• to git clone with submodules array-io-keychain repo
• run cmake in build directory with -G "Visual Studio 15 2016 Win64" (it may need to define BOOST_ROOT and OPENSSL_ROOT_DIR variables to specify dependencies locations)
• to change build toolchain in project settings fot keychain_common project from "Visual Studio 2017 (v141)" to "LLVM-vs2017"
• build keychain-service_win and keychain targets in solution

Unfortunately, I don't know how to set LLVM-vs2017 toolchain for certain project for Visual Studio cmake generator. It need some research. It may be some specific cmake variable. Or we can just modify vcxproj files of keychain_common project by bat script after project generation step.