Some UI changes required for Shiny release

Removed Camera permission as unnecessary in Manifest
Amended Maps message to redirect to Wiki and be more positive in the
potential for release of this app.
Maps help currently commented out. The help screens are in a state of
flux as major improvements are being done for release.
DTMF and Speaker buttons commented out as unsupported functions.
Remove broadcast from the peer list (#58)
String clarifying

Strings moved into seperate files. Working on Permissions Array.
Save a dummy meshms to broadcast
Display our SID before setting phone number
Remove commented out code
Initial commit of voice auth.
Use memmap'ed dictionary + index to fix OOM errors
Add intro auth screen, some UI tweaks

Add screen explaining auth procedure and allowing the user to select the
symbol generator to use.

Tweak the in-call UI to fit on an IDEOS phone screen.

Hide the "Begin Authentication" button of the completed call screen, and
make the auth status text on that screen correct.
Fix color handling for auth status text
Tweak auth intro UI
Fix bug where all words were missing last char
Move auth intro screen into separate activity
Add symbol screen. Use a stream of symbols instead of a list.

- Instead of displaying static lists of symbols, display a small group
  of symbols at a time, generating more as needed.
- Rewrite the symbol generator system to support the above.
- Properly handle activity switching, destruction, result propagation
  for the auth activities.
Add symbol group number and attack probability to auth symbol screen
Remove underline from "Attacker Detected" message
Simplify auth termination criteria, streamline UI

- The verifying user must now select the list they heard from a set of
  4.
- Replaced "probability" display with entropy display.
- Auth succeeds if both parties have successfully matched a list, and
  the total entropy is >= 64 bits.
- Auth fails if more than 1 error is made.
- Auth fail message now less alarming.
- Changed "Cancel" to "Authenticate Later"
- Replaced "Yes" and "No" buttons with temporary "Next" button -- will
  use in-channel signalling in future to keep synchronisation.
Revert to "yes"/"no" buttons, use Toast for alerts
Increase the required entropy to 256 bits.
Rework symbol management.