The text of the startup failure notification is unhelpful due to lack of
space. Touching the notification now launches an activity that gives details
of the problem and what can be done about it.

Closes #38

The permissions for the parent directory are too permissive (775) for Tor 0.2.7.5. The subdirectory is created with permissions 700.

"synchLock" will become confusing when we have lots of objects with "sync" in the name.

This breaks backward compatibility for the wire protocol and messages
stored in the database. The database schema version has been
incremented.