Added eight new RTS commands related to sector editing

[akaAgar]

New commands are:

• DAMAGE_SECTOR (tag) (sourceSpecialType): Copies the damage parameters (amount, damage type, delay, flash color, etc) from an existing special sector type defined in SECTORS.DDF and applies it to all sectors with a given tag. Use special sector type 0 (or any non-damaging special sector type) to disable damage.

• DRAG_SECTOR (tag) (factor) [ABSOLUTE]: Changes the drag factor of all sectors with a given tag. In absence of the ABSOLUTE optional parameter, value is relative and added to the current drag.

• FLAG_SECTOR (tag) (flag) (true/false): Sets/unsets a given flag in all sectors with a given tag. Available flags are AIRLESS, PROPORTIONAL, PUSH_ALL, PUSH_CONSTANT, REVERB_SFX, SUBMERGED_SFX, SWIMMING, VACCUM_SFX and WHOLE_REGION. True means the flag must be set, false that it must be unset

• FRICTION_SECTOR (tag) (factor) [ABSOLUTE]: Changes the friction factor of all sectors with a given tag. In absence of the ABSOLUTE optional parameter, value is relative and added to the current friction.

• GRAVITY_SECTOR (tag) (factor) [ABSOLUTE]: Changes the gravity multiplier of all sectors with a given tag. In absence of the ABSOLUTE optional parameter, value is relative and added to the current gravity.

• PUSH_ANGLE_SECTOR (tag) (angle) [ABSOLUTE]: Changes the push angle (in degrees) of all sectors with a given tag. In absence of the ABSOLUTE optional parameter, value is relative and added to the current push angle.

• PUSH_SPEED_SECTOR (tag) (speed) [ABSOLUTE]: Changes the push speed of of all sectors with a given tag. In absence of the ABSOLUTE optional parameter, value is relative and added to the current push speed.

• VISCOSITY_SECTOR (tag) (factor) [ABSOLUTE]: Changes the viscosity factor of all sectors with a given tag. In absence of the ABSOLUTE optional parameter, value is relative and added to the current viscosity.