fix bookmaker

add docs for new SkImage methods

Also, the tool slightly adjusted the spacing
for the include comments, and fixed a few references.

TBR=bsalomon@google.com

Docs-Preview: https://skia.org/?cl=155160
Bug: skia:
Change-Id: I7977ca3048bd7d0c23f84db19f62f7accdcd77bb
Reviewed-on: https://skia-review.googlesource.com/155160
Commit-Queue: Cary Clark <caryclark@skia.org>
Auto-Submit: Cary Clark <caryclark@skia.org>
Reviewed-by: Cary Clark <caryclark@skia.org>
3 files changed