hide dictionary when turn page in fb_reader.
hide dictionary when the book page changed in cr3.
hide dictionary when clicked in progress bar and using goto page(fb_reader).
Revert "hide dictionary when clicked in progress bar and using goto page(fb_reader)."

This reverts commit ebca7b2c98d6e1462eb454388b393c9810d88aad.
Revert "hide dictionary when the book page changed in cr3."

This reverts commit 6e6c7d8bc3eb170a6fc22b3ed6c2ef53af203ffa.
Revert "hide dictionary when turn page in fb_reader."

This reverts commit ffb727a9fb8b5c98b6185eef13d7c6d7867d1855.
move dict widget to bottom of screen when turn page in fb reader and cr3.
Merge pull request #7 from weihua/master

hide dictionary when the book page changed in cr3 and fb_reader.