Expose the function to start the API wrapper process on Linux explicitly instead of waiting until init is called.
Add access to SteamAPI_RestartAppIfNecessary
Move restartAppIfNecessary (processCommandLine) test to after linux startProcess call
Attempt to start the wrapper process if it isn't running when restartAppIsNecessary is called. Throw an error if the wrapper API process can't be started using the default path.