Added Slovak language localization.

Based on the en_GB translation. Copied Plural-Forms from pl since it's
similar, not sure if identical, though.

Note that date format at uistr.py:42 seemed to be outdated (didn't
translate correctly), so I used the format from uistr.py source, which
makes the translation work. Also, some of the line numbers seem to be
outdated.
Fix flake8 errors and enable in travis

Clean up whitespace, extra imports, redefined symbols,
and other errors and warnings reported by flake8.

Add flake8 to the commands run by travis.

Change-Id: Id3bdea24cad61c13c163970a4a13bc47e4ece553
Merge pull request #57 from kiith-sa/locale-sk

Added Slovak language localization.
Merge pull request #58 from dhellmann/flake8-fixes

Fix flake8 errors and enable in travis
Update CONTRIBUTORS
fix spelling error
spelling fixes
Merge pull request #61 from UtahDave/fix_spelling

fix spelling error
Merge pull request #62 from UtahDave/doc_fixes

spelling fixes
Update CONTRIBUTORS
Add support for genindex page
No processing should be done on non-relative, non-internal hyperlinks.

For example www.someothersite.com/#anchor would be wrongly patched to www.someothersite.com/mypage.html#anchor by the rule that replaces "/#" with "/" + page + "#".
Fix issue #55 around nav role="navigation" becoming navrole="navigation"

In Jinja2 -%} removes spaces after }, as opposed to %} which leaves whitespace intact.
Merge pull request #64 from gdw2/master

Add support for genindex page
Fixed problem with readmore within sections see issue #67
Merge pull request #68 from christianjann/master

Fixed problem with readmore within sections see issue #67
mark boilerplate searchbox header for translation
update translation template tinkerer.pot
Update tests for Sphinx 1.2.3. Sphinx now calls sys.exit which is caught by Nose if not handled otherwise.

This fixes all regressions except one.
Fix last failing unit test