Bugfix: The newer ssl protocol leads to phantomjs open url failure.

Signed-off-by: Connor Yan <126ium@gmail.com>
Ignore non 200 status when mime type check

Signed-off-by: Connor Yan <126ium@gmail.com>
Merge branch 'bugfix/0.7.6' into dev/0.8.0
Update screenshot.rb
Merge branch 'chinazoujy-patch-16' into dev/0.8.0

  Updated screenshot.rb