scripts in ch4 should be modified

[Watesoyan]

networkx.degree(...) yields a networkx.classes.reportviews.DegreeView object,
which has no method called *.values()
so, I think:

1. line 16 in basicNetworkMetrics.py should be modified to dict(nx.degree(g))
2. line 6 in basicNetworkMetrics2.py to for n in g.nodes():
   line 27 to d3 = dict(nx.degree(g2))
3. line 23 in basicNetworkMetrics3.py to graphsSorted = sorted(graphs, key=len, reverse=True)
   line 31 to graphDegree = dict(nx.degree(graph))
4. line 11 in basicNetworkMetrics5.py to graphDegree = dict(nx.degree(g))
5. line 10 in basicNetworkMetrics6.py to graphs = sorted(list(nx.connected_component_subgraphs(g)), key=len, reverse=True)
   line 15 to graphDegree = dict(nx.degree(ego))
6. line 18 in basicNetworkMetrics7.py to graphDegree = dict(nx.degree(graph))
7. line 17 in basicNetworkMetrics8.py to graphDegree = dict(nx.degree(ego))
8. line 19 in basicNetworkMetrics9.py to graphDegree = dict(nx.degree(ego))
9. line 24 in bonusWeightedGraph.py to d = dict(nx.degree(ego))

Yeah.I find it either.Maybe older version is Dict, but now it's DegreeView object.