Only build darwin on nightly for deployment. (Darwin builders are quite
slow on Travis.)

Also, add MUSL to Rust 1.12.0 builder.

SWIG from http://swig.org/

Fixes #296

Fixes #295.

This means that ripgrep will no longer try to reset your colors in your
terminal if you kill it while searching. This could result in messing up
the colors in your terminal, and the fix is to simply run some other
command that resets them for you. For example:

    $ echo -ne "\033[0m"

The reason why the ^C handling was removed is because it is irrevocably
broken on Windows and is impossible to do correctly and efficiently in
ANSI terminals.

Fixes #281

The point of the ~ dependency was to avoid implicitly increasing the
minimum Rust version required to compile ripgrep. However, clap's policy
is to support at least two prior releases of Rust (which roughly
corresponds to the convention that others use too), and that is probably
good enough.

The problem with using a ~ dependency is that it can make packaging
ripgrep in Linux distros difficult, because it means the packager may be
forced to package multiple compatible versions of the same library.

Fixes #271

2016-12-24-archlinux-cheetah uses the same setup/compile config as
2016-09-22-archlinux-cheetah. The improvements are nice.

The other 2016-12-24-archlinux-cheetah-* benchmarks try to suss out
a difference between MUSL, glibc, jemalloc and the system allocator.

This allows one to selectively choose which commands aren't
benchmarked.

Update docs to explain use of -g and --files to search for paths.

Fixes #284

Fixes #268.

Fixes #277

This was a very silly bug. Instead of creating a particular atomic once
and cloning it, we created a new value for each worker.

Fixes #279

Fix leading hypen bug by updating clap.

Fixes #270

When give an explicit file path on the command line like `foo` where `foo`
is a symlink, ripgrep should follow it even if `-L` isn't set. This is
consistent with the behavior of `foo/`.

Fixes #256

Instead of `Ok(n) if n == 0` we can just write `Ok(0)`.

When ripgrep detects a literal, it emits them as raw hex escaped byte
sequences to Regex::new. This permits literal optimizations for arbitrary
byte sequences (i.e., possibly invalid UTF-8). The problem is that
Regex::new interprets hex escaped byte sequences as *Unicode codepoints*
by default, but we want them to actually stand for their raw byte values.
Therefore, disable Unicode mode.

This is OK, since the regex is composed entirely of literals and literal
extraction does Unicode case folding.

Fixes #251

This changes the uppercase literal detection for the "smart case"
functionality. In particular, a character class is considered to have an
uppercase literal if at least one of its ranges starts or stops with an
uppercase literal.

Fixes #229

Fixes #247.

Add stylus type

Re-add zsh types

Seems like #197 got lost in #202