add refcount to multieoplist, cosmetics
change show fct to reflect different edit ops

cosmetics
add a backtrack fct to the xdrop class

returns a multieoplist
Merge pull request #23 from Garonenur/dw

add backtracking to xdrop class
remove gitweb script
change old gitweb links to github
Merge pull request #24 from gordon/master

finish move to github (remove gitweb script and fix links)
fix bug in tool.conf

The link to 'Browse Source' was missing in the tool pages.
Merge pull request #25 from gordon/master

bug fix in tool.conf
change behaviour of gt_feature_node_remove_leaf(), add to API
fix logic error in seqabstract
Merge pull request #26 from satta/remove_leaf

change behaviour of gt_feature_node_remove_leaf(), add to API
Merge pull request #27 from Garonenur/dw

fix logic error in seqabstract