"Play on Tumblr" should be able to override official keyboard shortcut

If you set "L" key in "Play on Tumblr"'s "Tumblr - Like Shortcutkey",
you will not be able to like a post in Dashboard.
Because "Play on Tumblr" overlaps with official keyboard shortcut.
Refine like() and reblogCount() in "Play on Tumblr"
Revise play() in "Play on Tumblr"

It seems that official keyboard shortcut's "play" only supports photoset and video post.
By this change, Taberareloo "Play on Tumblr"'s "play" supports photo(not full size),
photoset, panorama, link, audio(uploaded in Tumblr), video post, and inline image.
Merge pull request #209 from syoichi/pr32-PoT

Update "Play on Tumblr"