[Doc]: Updated doc. to be clearer for ScreenFlashFragment
[Fix]: Keyboard sometimes would not show up onFocus after resume

Fixed this behaviour by removing focus on resume.
Set checkbox to be disabled during cam flash & set keyboard to hide

[Mod][Fix]: MainFragment:
-Set checkboxes to be disabled when sending a message
-Set the virtual keyboard to be hidden when the message is sent (and by
extension, hiding it when when the flashing fragment appears)
Fixed the camera flash & reordered message ending

[Fix]: MainActivity:
-Camera flash was set always to be false, fixed this to be set to the
appropriate state.
-Camera flash is set to false after the message is complete. This
prevents double falses.
Fixed flash delay, refactored some functionality & added checks

[Fix]: There was a flash delay meaning that took over 200ms to reset.
This was caused by the camera being released and reinitalized, an
uncessary step that was removed.
[Mod]: Other changes to CameraFlashUtil:
-Added checks to to check if the camera has been closed (not null
but closed).
-Added checks for the visibility of surface view and set it to toggle
visible before setting
[Mod]: mainfragment.xml : Set the surgace view to in invisible.
[Mod]: Incremented version number (0.1.2) for alpha testing

Note that camera-flash will not work on rotation
Fixed isRunning() method & fixed close() null pointer exception

[Fix]: MorseTranscriber- isRunning() would only return true when sending
but not transcribing. Now returns true for both.
[Fix]: CameraFlashUtil - Added null check before synchronizing on
camera.
Add bool track if sending & set flash to transmit through rotation

[Mod]: MainActivity:
-Added bool to  to know when currently sending a message or not.
Including bundling handling.
-Ensured transcriber safety by cancelling before sending.
[Mod]: MainFragment:
-Set to maintain sending state between pauses (i.e. boolean, button,
text disabled, checkboxes disabled)
-Set to re-send upon fragment reload if currently sending. Thus allowing
for messages to keep flashing between 

[Mod]: Updated manifest version number to 0.1.3 for alpha testing.