add failing tests for verifying invocation with struct args
fix NSInvocation+TKAdditions to handle struct arguments
new fix for struct arguments
Remove leak and reorganize
Cleanup tests
Remove commented tests
Add two more tests, including stubbing with Struct args
Delete unused method
Cleanup tests
invocation getArgument must receive arg instead of &arg
Set struct padding to zero: avoids identical structs to be identified as different because of junk in padding
Improve test readability and clarify matching conditions for pointers inside structs
Extend stub tests to check struct with pointers
Add prefix to struct types
Make condition to detect structs a little bit more general
Merge verify-struct “bd0037f168775723f9ff4e3839039aec3dd8d6c9” into master