DnDice (User friendly roller)

4/1/2017

Big changes this time!
- Added a system for adding together dice rolls. (Thanks for the feedback, Brandon)
- Long press a dice to start adding together multipule rolls.
- Added clear log button
- Made the log go down a line automatically
- Log changed to prefer a monospace font
- Removed android.permission.WRITE_EXTERNAL_STORAGE.
- Removed android.permission.READ_EXTERNAL_STORAGE.

From 3 to 3.3.1:
- Sum now goes invisible when not in use.
- Sum font and clear-button size adjusted.