AdaMagic experiments

AdaMagic is almost the only way to target many platforms like 
WebAssembly and Elbrus e2k without compromising quality. It 
makes sense to get familiar with it.

AdaMagic is stuck at Ada 95. Little to no Ada 2005 support. 
Some compatibility code should be implemented.

AdaMagic lacks documentation. It uses either C or C++, but 
that is sometimes tricky. Sometimes tricky things are desired 
to be expressed, and this project is about achieving it.

The first thing to do was to backport atomic counters.

2019, Levashev Ivan Aleksandrovich, Saint Petersburg
