R: fix labels of curved edges, partially fix #181
R: allow fixing edge labels at given positions, #181.
R: no 'type' vertex attr after bipartite projection (#255).
R: printing logical attribute in header properly (#578).
R: add constructor for 'communities' objects (#547).
better error handling in GraphML parser; fixes a GraphML reading bug with the Python interface
GraphML reader is a bit more lenient now; makes it possible to read GraphML files saved from yWorks apps
fixed GraphML test case because the warning string has changed
Fixed a typo in adjacent_triangles function name.
Bipartite projection detects invalid edges (#543).
R: fix 'simplify' argument of graph.formula (#586).
R: better names by crossing(), fixes #587.
SIR: give error if graph is not simple (#582).
R: do not allow igraph calls from callbacks (#571).
Add a missing include in sir.c.
C/R: fix modularity formula and reference
Update plot.common.Rd

simple typo fix