Started on new Value type
evaluator draft
new style lisc evaluator can now create a hard-coded scene
added evaluate_immeadiates()
stuff moved into proper files
draft of parsing scene descriptions
Somewhat better error messages in evaluator
somewhat better error messages
restructured stuff and removed old stuff
read from file
reorganized lisc stuff
lisc parser now transforms <...> into (vecN ....)
added comments (--... and {-...-}) to lisc language
enclosing parentheses are now not used in scene files
lisc: variable support
Merge branch 'newparser'
preliminary camera support
lisc: support functions vec2 and vec4
camera can be defined in lisc file