mercurial: 2.6.2 and fix contrib/hgk not found.

hgk is an [unloved][1] feature. The extension (hgk.py)
is still installed but not the binray (hgk).

[1]: http://mercurial.selenic.com/wiki/UnlovedFeatures)
direnv 2.0.0

Closes #20540.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
libxml2: Clearer wording Homebrew's site-packages

Style fix in PythonInstalled req. that is :recommended.
go: add NetBSD cross-compiler

Closes #20537.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
colletd: add debug option

Closes #20578.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
newt 0.52.15

Newt (Whiptail) is a programming library for text-based user interfaces.
It includes python bindings named snack module.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
byobu 5.41

Closes #20538.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
ghc: use :macos
jstalk: use :macos and tarball
jstalk: add HEAD

There are unreleased fixes for building on newer SDKs than 10.6.

Closes #20543.
mupdf: use :macos
mplayershell: use :macos
nu: use :macos
povray: use :macos
Elixir: Show warning if Erlang R16 isn't installed

Closes #20459.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Boost bcp 2013.06-svn

Closes #20333.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
doxygen: add support for using libclang to parse files

Closes #20128.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Luvit 0.6.1

Closes #19925.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
jenkins 1.519

Closes #20582.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
libslax 0.16.0

Closes #20560.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>