cherrytree 0.12 issued

• fixed bug in the link to node: the link did not work if the destination node was hidden/his father was not expanded
• print/save as pdf now supports also the tables
• improved the right click menu for rich text and implemented an automatic selection of
text in case a text formatting was requested with no text selected (thanks Ray, Francesco)
• added the support for images in the import from notecase (thanks Romain)