Merge pull request goplus#687 from visualfc/oplshift

shift operations type check

Merge pull request goplus#653 from visualfc/nilcheck

fix goplus#652, func exec/golang.Const nil check

Merge pull request goplus#642 from visualfc/fixbig

golang: support inc/dec for BigInt/BigRat/BigFloat

Merge pull request goplus#629 from go-wyvern/recover

support feature recover for golang builder

Merge pull request goplus#622 from visualfc/findmethod2

cl: compileSelectorExpr use better lookup method

Merge pull request goplus#584 from visualfc/struct_method

cl: fix goplus#583 gopkg struct method found

Merge pull request goplus#617 from visualfc/complextype

cl, bytecode: support complex goinstr

Merge pull request goplus#585 from visualfc/stack_addr

exec,cl: fix goplus#551 spec.Builder add Addr instr

Merge pull request goplus#575 from JessonChan/range_for_improve

Range for improve

Merge pull request goplus#559 from visualfc/def_var

cl: support var define