some changes related to hyperlinkAttributes
some changes related to hyperlinkAttributes

added observer for the HyperLinkAttributeChange notification fired from
preferences, bug fix in performLinkfication: method that applied a
wrong cursor position after AutoHyperlinks did it's job (now saves
insertion point and restores it afterwards), implemented method to
toggle hyperlinkAttributes, either removes all attributes in range or
reinitializes the performLinkification method

ansilove/Ascension