Running '!add games' deletes all state data upon restarting twice #4

A bug causes matchbot to fail to read its state from the serialised JSON data if it contains a game literally called games. This leads matchbot to write null to the specified JSON file when it next exits, overwriting all the stored data about players and games.

Steps to reproduce:

As a user on IRC, send the command !add games to the channel which matchbot is listening in.
Restart matchbot twice.
Send the command !list and observe that no data is present, or observe that your chosen JSON data file (specified with the value of the data-file key in your matchbot configuration file) contains only the string null.

Those running instances of matchbot should immediately take backups of their JSON data file and update to version 1.0.1 of matchbot as soon as it is available.

A bug causes `matchbot` to fail to read its state from the serialised JSON data if it contains a game literally called `games`. This leads `matchbot` to write `null` to the specified JSON file when it next exits, overwriting all the stored data about players and games. Steps to reproduce: 1. As a user on IRC, send the command `!add games` to the channel which `matchbot` is listening in. 2. Restart `matchbot` twice. 3. Send the command `!list` and observe that no data is present, or observe that your chosen JSON data file (specified with the value of the `data-file` key in your `matchbot` configuration file) contains only the string `null`. Those running instances of `matchbot` should immediately take backups of their JSON data file and update to version 1.0.1 of `matchbot` as soon as it is available.

Resolved in pull request #5.

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Running '!add games' deletes all state data upon restarting twice #4