not found function checks before all functions (navigator metaclass)

[jtayped]

Before each function which is not in the Navigator blacklist, it checks if the page navigated to was found.

This process takes approx 1s, which can be fixed by comparing the source URL (before navigating) to the destination URL (after navigating), if they are the same, it can assumed that the page exists because it has already been checked previously.

The main Navigator metaclass is located in pygamecore/pygram.py.