Spawning near teammates

Fixes #1799 (closed) and makes the spawn spot selection much more reliable.

The change in defaults is what me and @RomanSixty agreed on as a reasonable value. The 0 was most likely an oversight anyway which caused players to spawn in a chain reaction e.g. https://www.youtube.com/watch?v=c2gbe-MzdAU&feature=youtu.be&t=1m5s .

The FOREACH_CLIENT_RANDOM macro unfortunately can't be nested due to QC arrays being global.