cherrytree 0.17 issued

• fixed bugs (thanks Bernard)
• the copy/paste now works intra application with single images, single codeboxes, single tables (added right click menu items) and a selection of rich text, images, codeboxes and tables
• the copy/paste functionality works also cross application (tested cherrytree exchange with openoffice and gmail) with single images, single codeboxes, single tables and a selection of rich text, codeboxes and tables (images not supported yet in a selection)
• copying a list of files from the file manager and pasting in cherrytree will create a list of links, images are recognized and inserted in the text
• copy/paste a single image from/to the clipboard works fine
• added Czech language (thanks Pavel)
• nodes import: it is now possible to specify where to attach them (thanks Bernard*2)
• tree nodes sorting is now case insensitive (thanks Bernard*3)