doc: format README

PR-URL: https://github.com/libuv/libuv/pull/1284
Reviewed-By: Bartosz Sosnowski <bartosz@janeasystems.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>

README.md

@@ -3,7 +3,7 @@
 ## Overview
 
 libuv is a multi-platform support library with a focus on asynchronous I/O. It
-was primarily developed for use by [Node.js](http://nodejs.org), but it's also
+was primarily developed for use by [Node.js][], but it's also
 used by [Luvit](http://luvit.io/), [Julia](http://julialang.org/),
 [pyuv](https://github.com/saghul/pyuv), and [others](https://github.com/libuv/libuv/wiki/Projects-that-use-libuv).
 
@@ -62,24 +62,34 @@ formats.
 
 Show different supported building options:
 
-    $ make help
+```bash
+$ make help
+```
 
 Build documentation as HTML:
 
-    $ make html
+```bash
+$ make html
+```
 
 Build documentation as HTML and live reload it when it changes (this requires
 sphinx-autobuild to be installed and is only supported on Unix):
 
-    $ make livehtml
+```bash
+$ make livehtml
+```
 
 Build documentation as man pages:
 
-    $ make man
+```bash
+$ make man
+```
 
 Build documentation as ePub:
 
-    $ make epub
+```bash
+$ make epub
+```
 
 NOTE: Windows users need to use make.bat instead of plain 'make'.
 
@@ -116,25 +126,32 @@ file, but are also available as git blob objects for easier use.
 
 Importing a key the usual way:
 
-    $ gpg --keyserver pool.sks-keyservers.net \
-      --recv-keys AE9BC059
+```bash
+$ gpg --keyserver pool.sks-keyservers.net --recv-keys AE9BC059
+```
 
 Importing a key from a git blob object:
 
-    $ git show pubkey-saghul | gpg --import
+```bash
+$ git show pubkey-saghul | gpg --import
+```
 
 ### Verifying releases
 
 Git tags are signed with the developer's key, they can be verified as follows:
 
-    $ git verify-tag v1.6.1
+```bash
+$ git verify-tag v1.6.1
+```
 
 Starting with libuv 1.7.0, the tarballs stored in the
 [downloads site](http://dist.libuv.org/dist/) are signed and an accompanying
 signature file sit alongside each. Once both the release tarball and the
 signature file are downloaded, the file can be verified as follows:
 
-    $ gpg --verify libuv-1.7.0.tar.gz.sign
+```bash
+$ gpg --verify libuv-1.7.0.tar.gz.sign
+```
 
 ## Build Instructions
 
@@ -144,18 +161,20 @@ backends. It is best used for integration into other projects.
 
 To build with autotools:
 
-    $ sh autogen.sh
-    $ ./configure
-    $ make
-    $ make check
-    $ make install
+```bash
+$ sh autogen.sh
+$ ./configure
+$ make
+$ make check
+$ make install
+```
 
 ### Windows
 
 Prerequisites:
 
 * [Python 2.6 or 2.7][] as it is required
-  by [GYP][].  
+  by [GYP][].
   If python is not in your path, set the environment variable `PYTHON` to its
   location. For example: `set PYTHON=C:\Python27\python.exe`
 * One of:
@@ -207,13 +226,17 @@ Examples:
 
 For Debug builds (recommended) run:
 
-    $ ./gyp_uv.py -f make
-    $ make -C out
+```bash
+$ ./gyp_uv.py -f make
+$ make -C out
+```
 
 For Release builds run:
 
-    $ ./gyp_uv.py -f make
-    $ BUILDTYPE=Release make -C out
+```bash
+$ ./gyp_uv.py -f make
+$ BUILDTYPE=Release make -C out
+```
 
 Run `./gyp_uv.py -f make -Dtarget_arch=x32` to build [x32][] binaries.
 
@@ -221,13 +244,17 @@ Run `./gyp_uv.py -f make -Dtarget_arch=x32` to build [x32][] binaries.
 
 Run:
 
-    $ ./gyp_uv.py -f xcode
-    $ xcodebuild -ARCHS="x86_64" -project uv.xcodeproj \
-         -configuration Release -target All
+```bash
+$ ./gyp_uv.py -f xcode
+$ xcodebuild -ARCHS="x86_64" -project uv.xcodeproj \
+     -configuration Release -target All
+```
 
 Using Homebrew:
 
-    $ brew install --HEAD libuv
+```bash
+$ brew install --HEAD libuv
+```
 
 Note to OS X users:
 
@@ -239,8 +266,10 @@ Make sure that you specify the architecture you wish to build for in the
 
 Run:
 
-    $ source ./android-configure NDK_PATH gyp
-    $ make -C out
+```bash
+$ source ./android-configure NDK_PATH gyp
+$ make -C out
+```
 
 Note for UNIX users: compile your project with `-D_LARGEFILE_SOURCE` and
 `-D_FILE_OFFSET_BITS=64`. GYP builds take care of that automatically.
@@ -249,18 +278,22 @@ Note for UNIX users: compile your project with `-D_LARGEFILE_SOURCE` and
 
 To use ninja for build on ninja supported platforms, run:
 
-    $ ./gyp_uv.py -f ninja
-    $ ninja -C out/Debug     #for debug build OR
-    $ ninja -C out/Release
+```bash
+$ ./gyp_uv.py -f ninja
+$ ninja -C out/Debug     #for debug build OR
+$ ninja -C out/Release
+```
 
 
 ### Running tests
 
 Run:
 
-    $ ./gyp_uv.py -f make
-    $ make -C out
-    $ ./out/Debug/run-tests
+```bash
+$ ./gyp_uv.py -f make
+$ make -C out
+$ ./out/Debug/run-tests
+```
 
 ## Supported Platforms