TF2 Tutorials: How to disable Steam Cloud Synchronization

There's a lot of confusion on exactly how to disable Steam's Cloud Sync for TF2. This leads to a lot of people thinking they have it disabled, yet still getting new configs over-written. Here's how to do it the right away. Question from bcpk @ http://www.reddit.com/r/tf2/comments/fu9pj/where_is_my_tf2_getting_its_cfg_from/