Modified the player default geometry to better match real world players.

[Malcolmnixon]

This pull request fixes issue #360 by adjusting the default players geometry as recommended.

Additionally this highlighted an issue entering the teleporters. Entering the teleport area wasn't reliable as the ramp was at 45 degrees which is also the default slope limit of the player. It was usable before because the players body was large enough to trigger the teleport area anyway. This lowers the slop of the teleporter ramp to around 33 degrees so the player can reliably walk into the teleporter.

[Malcolmnixon]

The following seems to be a fairly good standard measurements chart for referencing:

The result of this indicates:

Measurement	Male	Female	Average
Height	1.77	1.66	1.71
Arm Length	0.72	0.67	0.70
Hip Width	0.34	0.35	0.34
Depth	0.195	0.185	0.19
Eye Forward	0.085	0.080	0.082

Given this, sensible approximations for a capsule approximation seem to be:

Geometry	Value	Description
Radius	0.17	This covers the players width
Minimum Height	0.6	This lets the player bend over and pick something off the ground
Maximum Height	2.1	This is slightly over the 97.5th percentile
Eye Forward	48%	This is based on the radius

[BastiaanOlij]

lgtm