add fields: Groups, depends, requiredby. Pass through new graph function to compute the dependencies. Use new function tree_iscurrent, tree_isenabled

bug fix: pass trough seed file only for 66-enable process, use new interface of tree_isvalid() function

complete revamp of the 66-tree tool: interface change, add depends/requiredby and groups features. Allow to create a tree by a seed file

revamp of the info_walk, info_graph_init and info_graph_display function. Add info_graph_service function

rename service_resolve_svtree function to service_intree. Rename struct ss_resolve_graph_style to info_graph_style

complete reframe of resolve API function: allow to use different struct of resolve in function of the object to deal with. Split service and tree resolve function to separated file.

[WIP] Implementation of new graph API. Implements seed file features. Use new interface of sastr_dir_get.