v0.2.1

Main changes:

• For greater compliance with the IEEE 754-2008 standard, the std::math::isNaN function was added. This means that numbers can now take NaN values even with fastmath;
• Now the functions std::fprint and std::finput requires a pointer to the file structure as the first argument;
• A number of functions have been added for the half type in std/math.

Minor changes:

• A bug related to an attempt to call a method through an overloaded index operator in a structure was fixed;
• Now on x86 and x86_64 platforms spinlock uses the pause instruction;
• std/memutil has been removed;
• The compiler now uses more information about the output platform for better optimizations.