Comparison chain a<b<c

[tmteam]

Simplified syntax for the case when there are several comparison operations connected via And, which involve the same arguments.

# Was

a<b and b<c and c<d

# became

a<b<c<d

Provide support for operations <, >, <=, >=

if(a>b<c) ...
if( a<= b >= c)...

[tmteam]

This task depends on syntax of #46
because if we take a syntax for generic argument types - then this feature has to be canceled