complete specification for tree_add functions feature/tree_add

merge changes from default branch feature/tree_add

change cx_tree_link() from prepending to appending children - fixes #391

fix mixed up arguments for calloc()

add prototypes for cx_tree_add() family of functions feature/tree_add

minor doc fixes

(0) -300 -100 -30 -10 -6 +6 +10 tip

mercurial