update pkg manage GUI for extra scopes
fix a test prop
avoid a compiler warning
Split redex enumeration code into multiple files.
Memoized redex dependent enumeration.
parallelize the contract tests

(unfortunately, the speedup is not that great)
fix spacing in contract error message
adjust backward-containing-sexp so that it returns #f
when there is no containing paren

it used to return the beginning of the region (usually 0)

(this adjusts backward-containing-sexp to agree with the docs)
add `#%declare', require declaration of cross-phase persistent modules
allow `gensym' and `string->uninterned-symbol' in cross-phase persistent
Make `syntax-procedure-{alias,converted-arguments}-property' cross-phase
configure installation of man pages
create "man1" directory before trying to put a man page there
remove bogus cross-phase-persistent declaration

Also fix and improve source-location reporting.
raco pkg show: include only non-auto by default
adjust ".plt" S-expression matching to accept more old archives
quick: fixup for `slideshow' vs. `pict'
show package for each module in documentation

The package is normally determined automatcially, but
the `defmodule' form also supports a `#:packages' option.
fix `raco setup' package-dependency check when PLaneT package is installed