v0.7.5

Changelog

b057ada Add an example of yaegi in a shebang line
6d90c5a Case sensitivity fix
712891d fix: allow reuse of _ symbol in the same scope
23dfef0 fix: define a correct zero value for an not initialized interface{}
137b165 fix: handle binary methods where receiver is implicit
92a63db fix: handle out of order type declaration for global var declaration
4fd6a2d fix: handle recursive type definition involving a map object
e434892 fix: import different source packages with same base name