stocnet/manynet: Release v2.3.4

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