Merc Ridge A4

- Removed flank room which leads around point
- Added drop-down from where the removed flank ended to underneath the point, increasing the size of the tunnel
- Added platform in basin area

- Removed door into building from flank
- Changed sizes of health and ammo packs (less on flanks, more on main routes)
- Minor optimisation

- General redesign of the point, connectors and spawns