multiline regex in match patterns

Added len function

fix test many_word_parameters

docs

expand arrays into arguments

set individual array elements

access individual array elements

fix string expansion, particularly globbing

let: append and prepend operators

added let operators

improved let and some array support

fix conditional operator precedence

some refactoring

don't crash in case of parser error

added || and && operators. must fix their order

added ! operator and slight refactor

more useful error for glob errors

fix #2

1 week holiday

remove dbg message