Added new flags to work with RQ engine.  FL_HEAVY and FL_LIGHT, they affect the entity's gravity to a factor increased or decrease of 2.
Added new flags to work with RQ engine.  FL_HEAVY and FL_LIGHT, they affect the entity's gravity to a factor increased or decrease of 2.

odnarb/runequake,odnarb/runequake,odnarb/runequake