prevent flinging up into any land.

Recognize some built-in functions

Less code

Prefix followed by prefix issue solved. Also some slight improvements.

Fix for issue #291 - this check should probably be in ApplyDamage though

Disable loading content.html on startup, it is fetched on pushing to top of stack already.

increase land tex size to 512, which is the current minimum required just to load a hat. On my system max fps rose from 840 to 890 - about 6% change. also a nil check, probably not needed.