adds information about how to run the tests
Merge pull request #301 from leandromoreira/patch-1

adds information about how to run the tests
Added html_img playback for images.
Removed unused template.
Removed unused referenced to template.
Merge pull request #304 from ronag/master

Added html_img playback for images.
CONTRIBUTORS: add @ronag
bump to 0.0.73
unifies volume changes in a method
adds localStorage support check
adds support to persist volume
persists and restore volume from localStorage