Closes Homebrew/homebrew#20445.

Fixes Homebrew/homebrew#20417.
Closes Homebrew/homebrew#20474.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Pinned formulae which were pinned at a previous version but then upgraded
would not be listed by `brew list --pinned`. This is due to the good old
"File.exist? thinks broken symlinks don't exist" gotcha, so the test in
the select block in list_pinned has been changed to check if the pin file
exists _or_ is a symlink.

Closes Homebrew/homebrew#20423.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Also complete --devel and the formula's install options.

Seems to be that 10.9 needs the same ones as 10.8.

Fixes Homebrew/homebrew#20436.

Closes Homebrew/homebrew#20410.
Closes Homebrew/homebrew#20401.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

This might not detect all cases, but should detect the two most
common ones.

Dependency names retain the "tap prefix", e.g. the "homebrew/dupes"
part of "homebrew/dupes/zlib". However formula objects do not, and this
is desired because we do not record the tap name as part of the
installation prefix.

So we need to ensure the correct dep names are passed to superenv,
otherwise it will not add the correct directories to various environment
variables.

Closes Homebrew/homebrew#20357.