Adding viewport meta tag for iPhone
Correcting examples and removing possible point of confusion

They wrote a half second of sound, but a comment indicated they
wrote 1 second.

To write a full second would require 441 writes of the cycle,
which is coincidentally similar to the sound's frequency of
440Hz. So, changing the number of writes to 100 to hopefully
be more clear that that number is unrelated to the frequency.
(This results in a short beep rather than a full second of sound).
Adding audio tags for 'Getting Started' examples
Adding link
Fixing example code, and adding example output
Fixing formatting of code examples
Improving line height
Visual improvements to mobile version of home page