Added Android and Spring Security bindings
Auto refresh access token; Fixed minor bugs
Closes #2: Modified enum with correct endpoint
Modified GetPersonCalendarClassesAsyncTask and GetPersonCoursesAsyncTask to call the correct endpoints
Fixed javadoc in GetPersonCalendarClassesAsyncTask and GetPersonCoursesAsyncTask
Merge pull request #4 from AfonsoFGarcia/issue/2

Issue/2
Fixed wrong endpoint invocation. Fixes #6. Exceptions during the instantiation of the HTTP Client will now be wrappable in FenixEduException
Fixed exception handling.
Added language support for endpoint requests.
Added Shuttle and Canteen endpoints.