Fixed Error ignoring fields in getandcount
Added features and fixed bugs in leaderboards

Bugfix: saveAndList no longer throws errors on splice
Bugfix: Replay data can now be excluded from mongo queries as per commit
b286c75
Added: filterbyid flag to enable filter by friendslist, as without it
saveandlist stopped working
Added: getReplay function to pull replay data from any entry using its
hash
Added: getrivalreplays: gets replays of similar scores
Added: saveAndList now has optional before and after counts, rather than
just returning the players page of leaderboards can return arbitrary
amounts on either side