Update xthor.py (#4161)

* Add midgetspy back to copywrite, because echelon sent a DMCA. (#3938)

* Show information in poster view in seperate DIV (#4011)

Added a new DIV to hold the show information.
This way custom CSS is more dynamic. And if original CSS is used, there is no harm.

* Revert "Show information in poster view in seperate DIV (#4011)" (#4016)

This reverts commit 72f937b3.

* Update xthor.py

modify the url for xthor.to