Feature Request; I would like to override properties (player count, play time) of games I own for better collection searches

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I would LOVE to be able to override properties for games in my collection.

I have many games where I do not agree with the supported player count, play 
time, or other properties in the BGG database. I would love it if I could 
override properties for games in my collection so that the search is actually 
accurate for me.

Here are three examples and possible syntax based on a similar feature in the 
BggToNanDeck tool (semi-colon indicates comments). I have quite a few games 
where I want these sorts of tweaks to make my personal search results more 
useful.

; "Star Realms" I only have 2 decks so I can only play up to 4 players. 
; I don't want Star Realms showing up when I'm searching for a 5-6 player game.
147020, maxplayers, 4

; "Perry Rhodan" This game takes me closer to an hour. I don't want it showing
; up when I search for a 30 minute game.
30367, playingtime, 60

; "Set" The BGG DB says maxplayers is 20 but I only consider it playable 
; with up to 10 so I don't want it showing up when I search for games from 
; my collection for 11+ players. Also, I don't recommend it with 9 or 10.
1198, maxplayers, 10
1198, 9player, N
1198, 10player, N

Original issue reported on code.google.com by hal...@ea.com on 10 Jan 2015 at 6:01