Crypto.C - Cleanup

[rjbrown2]

• Check IV-len against maximum IV- Length (Will need to be defined)
• Check Gvcid Counter against bounds
• Check for Null Pointers
• Check for Size > 0
• Clean up Commented COde
• Finish or Remove TODOS
• (~Line 147) - Add return code, and fix to single return statement
• (235 - Unused Code) Remove?
• Remove //Testing Code Comment - and specify what these are
• Remove Magic Numbers
• Add more comments

[rjbrown2]

This can probably be combined with #315

[Donnie-Ice]

Not sure about cases of Check for Size > 0. For-loops do that automatically. Marking as complete for now.