Adjust code block style

Smaller font; restore normal line height.
Reduce the text size of inline code, too

Tone down the difference.
Add extra margin above headings
Remove <div> quines around syntax highlighting blocks
Set white-space: pre; for code blocks

This protects Objective-C method notation against ugly line breaks
(after the - or + in '-someMethod:').
Post: "Subclassing Delegates"
Copy footnotes inline with JavaScript; display with CSS

Footnotes triggered by links near the right side of the page can clip
off the edge. Need to fix this.
Jekyll build

jekyll 1.2.1
Darwin Pseudonym.local 13.1.0 Darwin Kernel Version 13.1.0: Thu Jan 16 19:40:37 PST 2014; root:xnu-2422.90.20~2/RELEASE_X86_64 x86_64

Configuration file: /Users/jmah/Documents/Streams/dev-etc/_config.yml
            Source: /Users/jmah/Documents/Streams/dev-etc
       Destination: /Users/jmah/Documents/Streams/dev-etc/_site
      Generating... Configuration file: /Users/jmah/Documents/Streams/dev-etc/_config.yml
done.