Call out proper name of module in import statent

added the missing "3" at the end of the import statement in the GitHub Enterprise section

Merge latest 0.9 into master

(cherry picked from commit 7a60063f)

By making Events subclass GitHubCore, it will be passed a session when
created. When that happens, any element of the payload that we convert
to a github3 object will also have the same session.

Fixes #303

(cherry picked from commit f6510976)

Conflicts:
	github3/events.py

Fixes #304
Fixes #305

Make "s" in "https" optional to match URL w/ regex

Fix typo: initializaiton => initialization

Some folks may be using a GitHub Enterprise server that doesn't support
HTTPS.

There is a great deal of complexity in requests surrounding how headers
are managed and merged. Since the authentication is applied after
headers are merged, using basic authentication can still be applied.
Using this context manager ensures it will not be set again.

Fix #288

(cherry picked from commit 7b3f589d)

Conflicts:
	tests/unit/test_repos_release.py

Add review comment

tox.ini: Bring over changes from 1.0-alpha branch

These are the changes that @sigmavirus24 did to `.travis.yml` on the
`1.0-alpha` branch in sigmavirus24#287

These are the changes that @sigmavirus24 did to `tox.ini` on the
`1.0-alpha` branch in
https://github.com/sigmavirus24/github3.py/pull/287

Fix typo comments to commits

Use absolute relative imports

Make tests pass on develop after upgrading to requests 2.4.0 with betamax

Contributors

Also put json.get() in the "if json is not None" check