remove commented code
rename numberOfChrildren to countChildren
add navigation on local tree
use local nav in newick tree
port segsites to local nav
remove track_local_node
allow calc for the local root
remove too strict assertions
add function description
Merge pull request #26 from scrm/local_forest_nav

Easier navigation on local tree
Merge branch 'master' into orientedForest
reimplement generation of OF recursively