zgw.py: a lightweight z39.50 web gateway

currently searching database VOYAGER on z3950.loc.gov
query syntax: CCL / result syntax: USMARC (element set F)

usage: either use the form (see below for syntax) or GET your query from /zgw/search/<query_string>.

examples (in CCL syntax):

• author: au="van rossum, guido"
• title: ti="henriette d. avram retirement program"
• keyword + boolean: ("blue book" or "blaue buch") and wittgenstein