Krafthack/ladders — pull request #14 by frodetbj (2014-11-26 13:29:47+00:00)
Title: Elo-ranking

Fixes #13.

Changes databasemodel, thus must migrate data when this change is applied.

Refactored quite alot of code.

New DB-model:
```javascript
{
"_id" : ObjectId("5474dec229247100009214b2"),
"date" : ISODate("2014-11-25T19:55:46.362Z"),
"loser" : {
"for" : 3,
"against" : 10,
"players" : [
{
"name" : "olav"
},
{
"name" : "pål"
}
]
},
"winner" : {
"for" : 10,
"against" : 3,
"players" : [
{
"name" : "calle"
},
{
"name" : "stien"
}
]
},
"__v" : 0
}
```