Optimization

Overall install size reduced.

• igraph object saved to speed up computations.
• Added sg_scale_color to scale color according to node size.
• sg_noverlap_p fixed.
• sg_zoom_p added.
• fixed many events callbacks.
• sg_get_nodes_p and sg_get_edges_p added to retrieve nodes and edges from draw graph.
• sg_drop_edges_p and sg_drop_nodes_p now function properly.
• The filter family of functions has been reworked and sees the addition of the name argument as well as sg_filter_undo_p to undo fitlers (by name) as well as new functions to filter neightbours and more.
• sg_clear added to clear the graph.
• sg_change_*_p family added to change nodes and edges attributes on the fly.
• Event improved.
• sg_read_*_p family of functions to easily add nodes and edges in bulk.
• sg_read_delay_*_p family of functions to easily add nodes and edges in bulk with a delay.