Änderungen

towards running maps with lua
current problem is apparently: compiled.lua:420: main function has more
than 200 local variables
 (commit: c3cba07)

lua: fix default value for tuples
 (commit: d37b8cc)

lua: reserve "error" name
 (commit: cce953c)

lua: only add natives and bj functions if not defined yet
 (commit: 1d56455)

lua: exclude bj functions/vars from mapscript and remove garbage
---> Hello world working
 (commit: a6f3853)

lua: don't rename external functions and vars
 (commit: 7bcc2c5)

lua: handle generics correctly
uses erasure
 (commit: cd29808)