MANIFEST.in: Distribute the examples/ directory

Avoid:

  $ make -C docs html
  ...
  /.../Flask-Cors-1.7.1/docs/index.rst:121: WARNING: Include file u'/tmp/Flask-Cors-1.7.1/docs/../examples/simple_example.py' not found or reading it failed
  ...

by packaging the referenced files.
Merge pull request #50 from wking/distribute-examples

MANIFEST.in: Distribute the examples/ directory
Only release on non Python 2.6 travis
Add whitespace in readme to reduce errors in pandoc's rst
Merge pull request #51 from wcdolphin/patch/readme-rst

More documentation fixes
Update version to 1.7.3
Replaces travis ci png badge with svg version
Merge pull request #52 from wcdolphin/patch/travis-badge

Prettier Travis CI shield
Remove debugging print statement
Merge pull request #53 from abenea/master

Remove errant debugging print statement
Bump version to 1.7.4
Use GithubFlavored markdown for pandoc RST conversion
Changes default settings to allow all HTTP verbs (including PATCH and DELETE) by default
Merge pull request #57 from wcdolphin/patch/methods

Changes default settings to allow all HTTP verbs
Add mismatching origins test
Fixes issue where CORS headers are returned even without a match.
Uses more realistic domains for testing purposes
Pep8 cleanup tests/test_origins
Refactors and simplifies CORS headers determination
Ensures CORS options are not evaluated twice