Modernize style of DemoMonkey

[natechan]

• Change class name from MyDocument to Document.
• Prefer dot notation for property access (and property-like method calls) wherever possible:
  • For example, searching for count] turns up a number of hits for access to the count property on NSArray.
  • Another example: arrangedObjects] turns up a number of hits. Add a category on NSArrayController which exposes a readonly property bnr_arrangedObjects of the right type (NSArray *).
• Use explicit types in method signatures.
• Simplify pragma marks.
  • Replace uses of

#pragma mark -
#pragma mark Some Header Name

with

#pragma mark - Some Header Name

• Add more things to this list.

[lyricsboy]

I believe I caught all of the :sender stuff in #2 just before you merged :)

[lyricsboy]

Specifically in cf32c41

[natechan]

Great :)