* [GV_ATTRS,FIX] Parsing can be det here.
* [GV_ATTR_TYPE,NEW] Added string//1.
* [GV_COLOR,FIX] Add support for GV color names.
* [GV_TREE,SC] Separate module for GV export of trees.
* [GV_GIF,NEW] New module supporting the construction of GIF representations.