Merge pull request #1 from mnipper/master

Master
Return for showing notifications if context is null
Fix merge conflict
Disable landscape orientation for instrument list fragment
deselect special response buttons when a response is created/selected
Merge branch 'develop' of https://github.com/mnipper/AndroidSurvey into develop
Clear special response when response is typed, clear response if special response is selected
Fix merge conflict
Remove OnSaveResponseListener callback.  See commit 597f13fa84e11349972b03477a3e6de0987b1dba for a more simple implementation that accomplishes the same thing.
Begin to add spanish translation of graphics
add section translations
Merge branch 'develop' of https://github.com/mnipper/AndroidSurvey into develop
Add spanish translated icons for special responses
Merge branch 'develop' of https://github.com/mnipper/AndroidSurvey into develop
Finish adding translated special response images for spanish
Show current instrument version for each instrument in the instrument list