Cryptic error codes when using drafter_c_parse

[w-vi]

When using the simple parsing function int drafter_c_parse() the return value of not zero is quite cryptic. To figure out what the value actually means one has to dig deep into snowcrash to find out and even then it's not really obvious what the problem is. Would it be possible to provide an interface to get detailed description of the error? Either classic strerror or some other way like if error != 0 the *result will contain error description.

[w-vi]

Drafter 3 introduced new API so this no longer apply