openbor Tools

- Clearn up some structures in openbor.h (damageonlanding now supports value greater than 127).
- Allow decimal value for freeze time.
- Make script function projectile more usable. All parameters are optional (default to custknife and throwframe values), if the first parameter is 1, then the position is relative to its caster.

For example:
@cmd projectile 1 "hadouken" 50 70 1

- A little clean-up in font code.
- Check name and index first in knife_spawn and bomb_spawn, because they are obviously intended.

NULL return value in openbor_projectile before return E_FAIL.

Add selectable as loadmodel's third parameter (since changemodelproperty is not complete).
Add level->bosses count check for openbor_spawn.

Add waiting to system variant (or should it be a level property?)
Merge some property lists for better maintainability.

Force playercount = 1 even if all players have died in smartspawn, otherwise all spawn slots are skipped.

Forgot to initialize return value for allocscript, fixed.

New script functions:

allocscript()
loadscript(handle, path) ...multiple times
compiilescript(handle)
executescript(handle)
...
free(handle)

Add combostyle 2 (SOR3 style).
So,
combostyle 0 = default bor pattern (default),
combostyle 1 = golden axe style (range based),
combostyle 2 = SOR3 style (chain without hitting),
combostyle 3 = 1+2 (though it is hardly needed)

Use magic number for bitmap, screen and sprite, make script resource management easier.
Remove script function getpixel, use getgfxproperty instead.
* getgfxproperty(handle, propertyname, ...)
- handle can be sprite or screen
- propertyname: width, height, srcwidth, srcheight, centerx, centery, pixel...
- for pixel, x, y must follow
- other properties such offsetx, offsety have not been added yet.