Edited design of send answer screen

edited the design of the send answer screen to match the "Openstaande
vragen" screen on Google Drive.
Small correction naming

Removed "imageView1" names etc. in send answer.
Fill send answer activity with mock data

When called the send answer activity will be filled with temporary mock
up data.
Syncing with master
Changes to send answer activity

Renamed a few things, added/corrected the buttons etc.
Use dummyBackend & fixed internationalisation

Now using the dummyBackend in the Send Answer activity, fixed the
strings.xml files so that languages work correctly again.
OnClickListener main list & button design update

The main list now has a OnItemClickListener that opens the right
activity for each listItem.
Button style updated, all future buttons will now use the correct
styling.
Merge pull request #9 from vbingley/master

Basic app flow & navigation