Making Fixed a couple of generate_islands() errors Fixed to grow bridges as choose(islands, 2) and not as islands Fixed deriving p from a two-mode network with a one-mode dyad count Added two-mode support to the last three generate_*() functions (closes #150) generate_fire() burns along two-paths, closing four-cycles instead of triangles generate_islands() builds a bipartite blockmodel with a planted diagonal generate_citations() keeps its recency mechanism, but the target crosses the mode divide, and both modes grow so that the concentration turns over Manipulating Fixed bind_changes.igraph() replacing the changelog instead of appending Added remaining row-wise verbs for the globals component (closes #149) Added bind_globals() Added filter_globals() Added arrange_globals() Added delete_globals() Added mutate_globals() to alter table columns Improved to_time() to scope globals as it already scoped ties, changes, and missings Modifying Added to_positive() to shortcut keeping just the positive ties of a signed network (closes #176) Marking Fixed is_signed() to check for a 'sign' column or a negative 'weight' column