review extended physical properties

[namdre]

The following models use <param> to define non-standard vehicle properties

• device.battery
• device.elechybrid
• emissionClass="Energy/default"
• emissionClass="MMPEVEM"

We need to check how these parameters overlap

• same semantics with differently named parameters
• same name with different semantics

Some parameters common to all models might be promoted to vType-attribute status (i.e. mass)