* Implements the concept of personality, a struct that
   contains information about the application identity,
   such as the program binary name and the application
   display name.  This enables the implementation of
   Pebble-based software that does not necessarily have
   the same name as Pebble.
 * Help strings throughout the application have been
   slightly modified so self-references to pebble/Pebble
   are removed without changing the semantics of the
   help manual.

If the client panics due to the Pebble daemon stopping early,
include the program name from personality so it's unambiguous.

Argument, option and command descriptions can now utilize the
`<display name>` and `<program name>` notation that will be substituted
with the corresponding values depending on the current binary personality.

 * `PersonalityInfo` has been removed in favour of independent variables.
 * Change `<personality var>` syntax to `{{.PersonalityVar}}`.
   (e.g. `{{.ProgramName}}` instead of `<program name>`)
 * Fixed `manfixer` logic in the help command.
 * Restored variables in help command instead of inline strings.