Add coverage to tox

Add the ``coverage`` plugin to ``nosetests`` commands run by ``tox``.
References #277. Additionally, add a few more compatibility imports.

Add initial (experimental) Python 3 support.

All tests* currently pass under Python 2.7 and Python 3.3 - 3.5. This
does not mean that Python 3 support is stable, however. As a plan
forward, we should encourage interested users to run Hyde with Python 3,
report bugs, and submit patches. This change references the Python 3
Support issue on GitHub (#270). Once this becomes a bit more tested and
stable, that issue should be closed, and Hyde should announce official,
stable support for Python 3 (i.e. new changes must also support 3,
issues with running hyde under 3 should be considered bugs rather than
feature requests, etc.).

Changes:

- Add ``hyde/_compat.py`` for 2-to-3 compatibility helpers.
- Replace uses of 2-specific code with their ``hyde._compat`` versions.
- Tests remain largely unchanged (for good reason). The exceptions here
  are to ``print`` function calls, and ``str`` type usage, and
  compatibility imports.
- Replace explicit calls to ``foo.next()`` with ``next(foo)``. This
  keeps code portable between Python 2's ``next`` and Python 3's
  ``__next__`` methods without the need for any compatibility functions
  and is the recommended API for interacting with these methods.
- Replace deprecated (and, in Python 3, removed) ``except Exception, e:``
  statements with their updated ``except Exception as e:`` versions.
- Replace print statements with print function calls (because of how
  parentheses work in Python, this is transparently
  cross-version-compatible).
- Add Python 3.3, 3.4, and 3.5 to ``tox.ini``, ``.travis.yml``, and
  classifiers in ``setup.py``.
- Add ``{posargs}`` to ``tox.ini`` command invocations to improve usage
  during development.
- Add Python 3 note in changelog.

* asciidoc does not support Python 3, and fixing that far beyond the
scope of this task, so the test that deals with it is conditionally
skipped when run using versions of Python 3.

New pep8 rules cleanup

Add CONTRIBUTING.rst

Add contributing guidelines taken almost verbatim from the commando
project (removes the requirement to update a version because new
releases may include more than one set of changes). Fixes #303.

Fix imports to reflect `tests` folder not being a python package.

Use container-based travis builds

Hoist tests out of the core package

Tests are not part of the core logic of Hyde, and they should not be
packaged as such.

Prep for 0.8.9 release.

- Update changelog
- Relax dependency version requirements
- Update readme
- Read setup.py requirements from requirements text files

Improve travis builds

Add caching, run tox environments separately, and don't run two builds
for each pull request

initial libsass support (by @llonchj)

Fixed broken favicon and apple-touch-icon links.

Moved favicon.ico and apple-touch-icon.png to the
`content/media/images` directory and edited `layout/base.j2` to
reflect these changes.

Use tox for testing

Add pages list to resources

paginator: no fail if no meta

Signed-off-by: Julien Danjou <julien@danjou.info>

Signed-off-by: Julien Danjou <julien@danjou.info>

Fix failing tests and formatting issues.

- Fix tests that were failing because of misconfigured
  template path
- Fix formatting issues identified by flake8

Honour template setting in configuration

Fix setting of query in HtmlWrap class based on availability of PyQuery

Custom tests support added similar to custom filters

Use setuptools directly

The current versions of commando and fswrap have been updated to use
setuptools. This change updates these dependencies to remove the usage
of distribute all the way down.

Distribute is deprecated; setuptools is now the recommended
packaging library.

Fixes #253, fixes #286

Revert "Dedupe deps"

Dedupe deps

We probably don't want an editable install normally, but we will for
development.

flake8 in integration

updated unittests