#17 New CU_ASSERT_HEX_EQUALfor comparing hex and not strings

[Mario Huizar]

It is needed to add the CU_ASSERT_HEX_EQUAL(actual, expected) which will do a memcmp and not a strcmp!!

I do this because the current CU_ASSERT_NSTRING_EQUAL will not detect the following snippet:

CU_ASSERT_NSTRING_EQUAL("\x3A\x00\xFF","\x3A\x00\xC6",3);

This is because the \x00 means end of string and thus it will return that the both data are equal.

Regards!
Mario