Videos, photos and audio recording natively saved to private application
directory to reduce I/O overload
Allow sharing note without text content if any attachment is present
Now application can receive shared videos and audio recordings.
A check has been introduced to avoid NullPointerException when a file
from online ContentProvider read-only is received
Removed "Reset All Data" option from settings. All application data have
been moved to private directory on external memory so you can simply use
default system data and cache cleaning
Moved note deletion to AsyncTask.
Added attachments deletion from storage.