Fix list:
- Make cmd not choke on recursive calls to build_env_x*.bat.
- Create build directories and move build output there instead of
polluting the root of the source tree.
- Make proper debug builds with pdb output.
- Make proper x64 builds of lobby_connect, and steamclient_loader. (lobby_connect_x64.exe, and steamclient_loader_x64.exe)
- Rename x86 build of lobby_connect.exe to lobby_connect_x86.exe.
- Rename x86 build of steamclient_loader.exe to steamclient_loader_x86.exe.
- Make proper distrib directories. (I.e. <release,debug>/<build type>/<arch>/<binaries>.)
