pyqt 4.10.1
sip 4.14.6
qscintilla 2.7.1
jruby 1.7.4
Stop running "prune" as part of "cleanup"

Rationale: "prune" is slow, does not need to be run as often as
"cleanup", and is potentially destructive to things like empty
directories that Homebrew did not create. Thus we should let users run
`brew prune` only when they wish to, while still being able to use `brew
cleanup`.

Closes #19863.
Remove gsutil

This is now available from PyPI, and the github tarball does not contain
all of the necessary dependencies, so remove it and recommend "pip
install gsutil".

Closes #19874.
Closes #19895.
sip: only apply patch to HEAD

Fixes #19919.
vim 7.3.969

Closes #19918.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Pius: fix hardcoded gpg path

Fixes #19915.
Closes #19916.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
upgrade: tighten installed precondition
upgrade: use a method rather than a boolean flag
upgrade: fix typo