Do not need to open with "a" since we will probably delete stuff later on
Removed default db filename
#define for the size of a serialized board
Removed TODO, I actually want the row to include the key
Utils function for open&seek (which we do a lot)
Utils function for open&seek (which we do a lot)
Better way to set the filenames of the database
Moved GCD() function to utils
Removed TODO, was already done
Used constant for ser. board size