wain-ast

wain-ast is used at run time in 5 crates.

Depender (with downloads and own rev deps)			wain-ast version
		wain		^0.2
	1	wain-exec		^0.2
	2	wain-validate		^0.2
	2	wain-syntax-text		^0.2
	1	wain-syntax-binary		^0.2