= http: fix URI encoding of non-BMP chars
= http: fix Cache-Control directives parser, fixes #862

3 changes:
  - `no-cache = ...` never worked because of ordering of parsing alternatives
  - list of field-names must be quoted completely not per-element
  - allow `token` for `no-cache` / `private` field-names to be more lenient
    even if the httpbis specification says

    "This directive uses the quoted-string form of the argument syntax.  A
     sender SHOULD NOT generate the token form (even if quoting appears
     not to be needed for single-entry lists)."

     (http://tools.ietf.org/html/draft-ietf-httpbis-p6-cache-26#section-5.2.2.2)
= docs: fix typos in (un)marshalling.rst
+ httpx: support new Play twirl with `PlayTwirlSupport`, fixes #887
= httpx: simplify Deflate

No looping is needed for proper compression / decompression.
= http: Always encode sub-delims in query names and values.

Per this W3C recommendation:

http://www.w3.org/TR/1999/REC-html401-19991224/appendix/notes.html#h-B.2.2

Servers are permitted to treat an un-percent-encoded semicolon as
a query parameter separator. Not many, but some, servers follow this
recommendation, so ensure that they are encoded in the URIs that
Spray renders avoid misinterpretation.
Merge pull request #888 from jrudolph/w/add-PlayTwirlSupport

+ httpx: support new Play twirl with `PlayTwirlSupport`, fixes #887
= project: update SBT and plugins
= project: upgrade dependencies
Merge pull request #855 from chadselph/fix-non-bmp-uris

fix for non-BMP characters when encoding URIs
= site: small fix in scaladays talk charts, add webinar charts
= http: fix bug in URI encoding previous patch, improve tests
Merge pull request #927 from atlassian/encode-sub-delims-in-query-parameters

Encode sub delims in query parameters
= http: restrict previous patch to query encoding from SUB_DELIMS to SEMI_COLON
= httpx: fix test failing after spray-json upgrade
Merge pull request #914 from spray/w/simplify-deflate

= httpx: simplify Deflate
= http: add missing alias for `US-ASCII` charset
= docs: fix typo
Merge pull request #881 from savulchik/fix-httpx-docs-typo

Fix typos in (un)marshalling.rst
Merge pull request #873 from jrudolph/w/862-fix-cache-control-parsing

Fix Cache-Control parsing