Another week of gtl::factory unit tests!

 While working on gtl::factory I came across multiple edge cases that caused the task to take slightly longer than expected, but I did manage to finish them during the week. Strings and vectors are quite an odd edge case to handle, but wasn't too harsh. The first issue came from the [] operator returning a copy instead of a reference, which made calling functions such as .push_back() or .append() to modify a copy instead of the data itself. Other operators also had memory leaking issues, as the old arrays weren't being dealt with before copying new data into the new array. Most of these edge cases were only an issue with resizable objects, but the process of debugging the code and removing all the leaks proved to be a bit of a challenge, but nothing too heavy beyond chasing down memory addresses.

This was the last instance of a memory leak I fixed before I checked out for the week. the original array was never being deallocated and led to issues with memory leaking.