Merge branch 'develop' into topic/ExperimentOnDocumentation

Conflicts:
	ReadMe.md
	doc/ChangeLog.md
	doc/ReferenceOfApis.md
	doc/ReferenceOfClasses.md
	github/AuthenticatedUser.py
	github/Authorization.py
	github/CommitComment.py
	github/ContentFile.py
	github/Download.py
	github/Gist.py
	github/GistComment.py
	github/GitRef.py
	github/Github.py
	github/Hook.py
	github/Issue.py
	github/IssueComment.py
	github/Label.py
	github/Milestone.py
	github/PullRequest.py
	github/PullRequestComment.py
	github/Repository.py
	github/RepositoryKey.py
	github/Team.py
	github/UserKey.py
	setup.py

github/GithubObject.py

@@ -63,11 +63,11 @@ class GithubObject(BasicGithubObject):
             self.__complete()
 
     def __complete(self):
-        headers, data = self._requester.requestAndCheck(
+        headers, data = self._requester.requestJsonAndCheck(
             "GET",
             self._url,
             None,
             None
         )
         self._useAttributes(data)
-        self._completed = True
+        self.__completed = True