fix constructor of valuetype

Merge pull request pangweiwei#160 from veboys/master

fix WriteEvent method, it can generate the right checkType method for the value type now

 fix multi-defination of ObjEqualityComparer

 update ver

Merge branch 'v0.8x' of https://github.com/pangweiwei/slua into v0.8x

 fix android performance drop with JIT on according to luajit mailist

 add IgnoreBaseAttribute to skip auto gen event base

Update LuaValueType.cs

Merge branch 'v0.8x' of https://github.com/pangweiwei/slua into v0.8x

Update LuaCodeGen.cs