f) store stuff to updated in a linked list prior to update fork
g) update child writes db file, parents reads db file when done (the msells/sbh alogrithm)
h) when reading directory db and checking for deleted, new, or changed stuff, assume all info is sorted (so we can deterimine if its new very quickly without searching through lists of stuff every time). Also, for new stuff, insert it with insertInListBeforeNode() function, to keep lists sorted.
j) when reading new directory db, we should block some signals when manipulating the directorydb, so we don't receive a signal to quit in the middle of an update
2) rewrite interface stuff, specifically command list handling etc so its less of a hack and deals with the above update stuff better
