Replaced ListView with ExpandableListView in CoursewareContentViewer.
All content in one week are now collapsed under a week heading. #6
Modified HttpGetRequest to allow Http POST. Added methods for setting
some additional headers. #11
Added method for actually executing post requests. #11
Added process for logging in without WebView. #11
Added status code and status message of http response to debug.

Added name of csrftoken to cookie. Fixed misspelling of password.
Added TextView for showing error messages.

Moved WebView-independent login code to tryLogin method. SendData-button
calls tryLogin method. #11
Removed all code related to WebView.

Removed some debug code.

Created a login button.

#11
Removed unnecessary matching when searching for cookies. #11
Error message is only displayed when an error has occured, and it is
removed when a new login is in progress. The login button is disabled
during login progress. #11
Added indeterminate progressbar when logging in. #11
Added http status code to class interface. #11
Added session memory. If a valid session exists, the login screen is
automatically skipped. #11
Removed login activity from history. Login check is run on start. #11
Added possibility to log off. #11
Changed layout of login screen. #11
Added test layout file to ignore list.
Merge branch 'expandable_content_view'
Merge branch 'remove_web_view_dependency_i11'

Conflicts:
	EdXVideoViewer/res/layout/activity_login_screen.xml
	EdXVideoViewer/src/com/github/krooken/edxvideoviewer/LoginScreen.java
Updated version.