Changes:
-Updated code sample (see http://ag/214812)
-Updated code snippets to match updated sample
-Fixed <> in code snippets
-Updated disk cache section
-Some other minor updates
Change-Id: Id7ca4d161f165814d71f238f940b2c5bfbc220aa
This directory is not included in the final docs output, but is
merely here as a "master" source for the downloadable bits that we
upload and serve from elsewhere, such as from Google Cloud Storage.
Change-Id: I181438f9ec4513cf2e49455803bbe434c8f29d36
