The .json format is the demboyz streaming json demo format.
The .con format is a log equal to what would be produced by TF2
with netmessage/demmessage logs enabled.
### Usage
./demboyz mystvdemo.dem mystvdemo.json
./demboyz mystvdemo.dem mystvdemo.con
./demboyz mystvdemo.json mystvdemo.dem
./demboyz mystvdemo.json mystvdemo.con
In the first example, mystvdemo.dem will be read from the current working directory, while mystvdemo.json will be written to the current working directory.