Lxa v0.2.6

Optimized Syntax Error Information.
Removed Assignment from ast.
Added BlockStat for sub code block in syntax.
Fixed bug caused by EmptyStat in ForNumStat, WhileStat and IfStat.

Lxa v0.2.4

Added Debug option for more details in running.
Added Parse Only option for watch bytecode.
Optimized Logical Expression generation, multiple and and or expressions are handled sepecially apart from Binary Opration Expression.

Lxa v0.2.1

Use Official lua 5.3.5 vm (written in c) as defualt vm. Added inner go lua vm as a option (several stdlib unsupported yet). Added Compile Only option to output compiled lua bytecode (since v0.2.0). Added linux support and x86 support (auto select static lib when compiling).