making default db the username's db

fixes https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1531
adding support for speech recognition training app
created a production experiment datum fragment

which just presents the stimulus, plays a prompt and records the result
fixes https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1532
displaying different background images based on tags (for category based flash cards) https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1532
added a list pager which makes it possible to swipe between datum

fixes https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1533
scrollabel flash cards a bit more memory optimized and turning of acra if not in release build config and using the first datum as instructions and making images show in the image view not hte video view...

fixes https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1537
fixes
https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1536
fixes https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1535
creating corpus directories in an app directory and playing instructions first is working
auto advancing between stimuli/cards

fixes https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1538
added a confirm dialog if users  want to add their own words
adding a high res version of the speech bubbles for backgroun dimage
aded a simple datum view for non-linguists fixes https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1539
putting default datum list back to using the datum views not a view pager
added audio upload for https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1437
checking if the cursor is null
adding bouncy castle but not upload not working yet
uplaod is working

including device details in the activity log for speech recognition information
deployed v2.4.0

fixes https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1540
fixes https://github.com/batumi/KartuliPocketSphinx/issues/7
downloading samples was on for the speechrec app
corrections to acra found while doing https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1541
renaming production experiment activity