Fixed a bug where the outdoors echo would still be active even after disabling the addon through the ere_active command.

Added a command called ere_respect_map_effect. When it is set to 1, the addon will cease to apply effects after it detects that a map wants to do it by itself. The default value is 0, which means the addon won't "randomly" stop working anymore.

- No longer continuously set DSP to 1 if the addon is disabled.
- Gave extremely small spatial size its own effect. It had no effect at all previously.
- Changed the effect of extremely large spatial size, since the old one had a jarring shift in volume compared to others.

- Added a slight echo to the outdoors spatial range.
- A different method of detecting existing effects.

Removed debug lines.

Fixed a small mistake in the spatial size detection code which causes the addon to think that an area is smaller than it actually is.

More accurate spatial size checking.

Removed spatial size check trace mask so that the addon also take props and other solid entities into account.