deps: upgrade c-ares to 1.10.0
doc: clarify subsystems in CONTRIBUTING.md
test: increase workers to 8 in cluster-disconnect

Increasing the number of workers from 2 to 8 makes this test
more likely to trigger race conditions. See #5330 for background.
blog: Release v0.11.2
benchmark: hash stream
lint
stream: don't create unnecessary buffers in Readable

If there is an encoding, and we do 'stream.push(chunk, enc)', and the
encoding argument matches the stated encoding, then we're converting from
a string, to a buffer, and then back to a string.  Of course, this is a
completely pointless bit of work, so it's best to avoid it when we know
that we can do so safely.
stream: Make default encoding configurable

Pretty much everything assumes strings to be utf-8, but crypto
traditionally used binary strings, so we need to keep the default
that way until most users get off of that pattern.
tools: remove unnecessary cpplint rules

We don't actually care about header order much, and since we never use
stl classes, 'string' isn't an issue for node ever.
src: Add StringBytes static util class

Four functions:

- StringBytes::StorageSize()
- StringBytes::Size()
- StringBytes::Write()
- StringBytes::Encode()
src: Use StringBytes in StreamWrap
src: use StringBytes for DecodeWrite/DecodeBytes/Encode

Bonus: this makes node::Encode actually work properly with base64,
ucs2, hex, etc.
buffer: DRY string encoding using StringBytes

This also templatizes the Buffer::*Slice functions, and the template
function probably cannot be safely used outside of Node.  However, it
also SHOULD not be used outside of Node, so this is arguably a feature
as well as a caveat.
crypto: Pass strings to binding layer directly
crypto: use StringBytes::Encode
crypto: Pass encodings to C++ for Sign/Verify
2013.05.14, Version 0.10.6 (Stable)

* module: Deprecate require.extensions (isaacs)

* stream: make Readable.wrap support objectMode, empty streams (Daniel Moore)

* child_process: fix handle delivery (Ben Noordhuis)

* crypto: Fix performance regression (isaacs)

* src: DRY string encoding/decoding (isaacs)
crypto: Pass encodings for Hmac digest
dns: add getServers and setServers

getServers returns an array of ips that are currently being used for
resolution

setServers takes an array of ips that are to be used for resolution,
this will throw if there's invalid input but preserve the original
configuration
Merge branch 'v0.10.6-release' into v0.10