Add ability to rebaseline skimage to rebaseline.py

Skip pattern matching for skimage, since the skimage results do not
match the pattern.

Automatically fill in expectations_root and actuals_base_url when
--skimage is specified.

Requires a change to move the expectations files to the right place.
Depends on https://codereview.chromium.org/26734006

(SkipBuildBotRuns)

BUG=skia:1466
R=epoger@google.com

Review URL: https://codereview.chromium.org/26666004

git-svn-id: http://skia.googlecode.com/svn/trunk@11717 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed