Added the ability to download images & attachments.
Added the ability to switch accounts.
Added automatic restart after account switch.
Add owning account information for shared tags
Correct minor bug setting oauth token when only one account is specified
Updated licensing info.
Change icon for notebook if it is linked or is a stack.
- Altered notebook view to account for different icons
- Added the ability to delete & rename accounts.
- Added a basic error message & retry count in the sync thread.
- Set line numbers on all log messages.