CI setup with artifact publishing

It was discussed that we need CI for the project and we also need the ability to publish build artifacts.

Here is a hyperlink for the required functionality for Travis CI:
https://docs.travis-ci.com/user/deployment/releases/
I think that the software must be portable so we should configure the maximum amount of build agents possible for:

• Windows
• Linux
• FreeBSD
• MacOS X

https://github.com/japaric/trust - example of configuring Travis CI and AppVeyor but note that the example is designed for Rust language.

#3 - Improvement to build Kumir2 on Linux with Clang and GCC.

http://blog.shippable.com/shippable-arm-packet-deliver-native-ci-cd-for-arm-architecture -ARMv8 architecture CI support (free) for OpenSource projects.