Support clt.un, cgt.un, conv.i4, conv.u4.
Support clt.un, cgt.un, conv.i4, conv.u4.

Disallow conv.i8, conv.u8, conv.i1, conv.u1, conv.i2, conv.u2, conv.i.

Add a \t to instruction listing when dumping invalid methods.

pratikv/SLSharp,IgniteInteractiveStudio/SLSharp,hach-que/SLSharp,IgniteInteractiveStudio/SLSharp,hach-que/SLSharp,pratikv/SLSharp