update: ct.Rune
refactor: Empty/NotEmpty from Base to Len
update: Conv: NotIs -> IsNot
update: README.md remove rune todo
update: Len add Equal/NotEqual
update: add Num.Equal / Num.NotEqual
update: NotHas -> HasNot
Merge branch 'master' of github.com:changkong/ct

Conflicts:
	README.md