Merge pull request #26 from samphunter/YSI.tl

Missing semicolon
Improved y_classes (sort of).
Completed command return values.
Merge branch 'YSI.tl' of github.com:Y-Less/YSI-Includes into YSI.tl
Updated amx.

The HEAD of the "amx" submodule referred to an invalid commit.
Merge pull request #29 from Zeex/YSI.tl

Updated amx.
Fixed crash in AMX_GetGlobal() when using JIT.

It's basically the same fix as 2 years ago:
https://github.com/Y-Less/YSI/commit/c5065d796575fca9d19128bd33ed04b04f0c2d41
Merge pull request #30 from Zeex/YSI.tl

Fixed crash in AMX_GetGlobal() when using JIT.
Merge pull request #1 from Y-Less/YSI.tl

Ysi.tl