Throwable interface and its implementation (Exception structs) with stacktrace information in Go.

Eli Cox 68a6ebdde9 Test passes. 6 éve
LICENSE 075c0502c0 Add LICENSE: public domain. 6 éve
exception.go 68a6ebdde9 Test passes. 6 éve
exception_test.go 68a6ebdde9 Test passes. 6 éve
null.go 68a6ebdde9 Test passes. 6 éve
null_test.go 68a6ebdde9 Test passes. 6 éve
throwable.go 68a6ebdde9 Test passes. 6 éve