cache: enable debugging with a flag
cache: enable debugging with a flag

Added a flag Cache.debug which will enable/disable cache debugging
output.  There is a very slight performance hit, in exchange for
readability, which will be resolved in a future commit.

Cache debug output is exactly the same as prior to this change.

theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver