only add plugin functions once
add support for importing scripts
add generated files
update documentation
make grammar more general
tweak assert error message
convert spaces to tabs
use Value instead of Value*
add error checking to makeplugin
use ASTnode instead of ASTnode*
free environments
Valgrind #1: free arglist
remove memcpy
Valgrind #2: free import strings
can't use NULL anymore
clean up some silliness
Merge pull request #17 from lukechampine/import

Add support for importing existing scripts
allocate environments on stack
tweak assignOp() and chain()
Merge branch 'master' of github.com:mkvsynth/mkvsynth