For many people `brew edit` makes use of the `EDITOR` variable to pick a
sensible editor. With environment filtering enabled unless this editor
is found in the default system PATH it'll fall back to e.g. `vim`.

Instead, ensure that we export the original, pre-filtering `PATH` as
`HOMEBREW_PATH` and use that internally to locate the editor. In future
this same approach will likely be used for requirements to be able to
find tools, too, and for other variables which we want to expose to
Homebrew itself but not other build tools.

Note that `HOMEBREW_PATH` is the same as `PATH` when build filtering
hasn't been enabled.

README: Add Charlie to former maintainers.

Partly revert “Fix `uninstall :pkgutil` leaving empty `.app` directories.”.

Replace `FileUtils.chmod` with `/bin/chmod` for cask binaries.

Update binary.rb
Update binary.rb
Update binary.rb

Fix `IO#select` blocking.

Remove extraneous }

Port OsxfuseRequirement to Linux

Fix `plist` parser failing when encoded with ASCII.

audit: fix swapped audit messages

Lowercase `caskroom` and add missing Taps.

Acceptable-Formulae: reword 'niche stuff'

xcode: 8.3.2 is latest version

install: don't search when formula is unreadable.

audit: allow skipping audit methods.

create: use GitHub metadata where available.

These formulae are detected as missing but exist in an unreadable form.

Fixes #2485

GitHub provides a description and homepage field so let `brew create`
use them where possible. Also, detect GitHub repositories based on
`releases` as well as `archive`s.

Add `--only` and `--except` methods which can be used to selectively
enable or disable audit groups.

audit: check for more universal usage.

uses: allow checking deleted formulae.

install: do not search taps when a qualified formula is missing

This is useful for seeing when formulae are deleted if they are going to
leave behind any formulae that depend on them.

As a result, if there are any formulae returned return a non-zero/failed
exit status.

travis.yml: keep taps.