Added support for various walking options in the AST visitor.
Added support for various walking options in the AST visitor.

SonyaSa/CppSharp,zillemarco/CppSharp,xistoso/CppSharp,txdv/CppSharp,xistoso/CppSharp,mydogisbox/CppSharp,ddobrev/CppSharp,genuinelucifer/CppSharp,mono/CppSharp,u255436/CppSharp,KonajuGames/CppSharp,mono/CppSharp,u255436/CppSharp,nalkaro/CppSharp,KonajuGames/CppSharp,genuinelucifer/CppSharp,zillemarco/CppSharp,txdv/CppSharp,ktopouzi/CppSharp,nalkaro/CppSharp,nalkaro/CppSharp,ktopouzi/CppSharp,SonyaSa/CppSharp,mohtamohit/CppSharp,ddobrev/CppSharp,imazen/CppSharp,mohtamohit/CppSharp,inordertotest/CppSharp,u255436/CppSharp,mono/CppSharp,KonajuGames/CppSharp,Samana/CppSharp,Samana/CppSharp,u255436/CppSharp,inordertotest/CppSharp,mydogisbox/CppSharp,inordertotest/CppSharp,SonyaSa/CppSharp,txdv/CppSharp,xistoso/CppSharp,SonyaSa/CppSharp,KonajuGames/CppSharp,imazen/CppSharp,zillemarco/CppSharp,txdv/CppSharp,nalkaro/CppSharp,mono/CppSharp,mohtamohit/CppSharp,genuinelucifer/CppSharp,ktopouzi/CppSharp,imazen/CppSharp,ddobrev/CppSharp,KonajuGames/CppSharp,nalkaro/CppSharp,Samana/CppSharp,inordertotest/CppSharp,inordertotest/CppSharp,mohtamohit/CppSharp,mono/CppSharp,xistoso/CppSharp,imazen/CppSharp,ktopouzi/CppSharp,Samana/CppSharp,txdv/CppSharp,Samana/CppSharp,mydogisbox/CppSharp,xistoso/CppSharp,ddobrev/CppSharp,zillemarco/CppSharp,genuinelucifer/CppSharp,ktopouzi/CppSharp,imazen/CppSharp,u255436/CppSharp,genuinelucifer/CppSharp,mydogisbox/CppSharp,ddobrev/CppSharp,mono/CppSharp,SonyaSa/CppSharp,mydogisbox/CppSharp,zillemarco/CppSharp,mohtamohit/CppSharp