Statistic Actions

getNumCardsReviewedToday

Gets the count of cards that have been reviewed in the current day (with day start time as configured by user in anki)

Sample request:
```
{
    "action": "getNumCardsReviewedToday",
    "version": 6
}
```
Sample result:
```
{
    "result": 0,
    "error": null
}
```

getCollectionStatsHTML

Gets the collection statistics report

Sample request:

{
    "action": "getCollectionStatsHTML",
    "version": 6,
    "params": {
        "wholeCollection": true
    }
}

Sample result:

{
    "error": null,
    "result": "<center> lots of HTML here </center>"
}