Merge tag '0.4.1' into develop

Version 0.4.1
Merge tag '0.4.2' into develop

Version 0.4.2
Merge tag '0.4.3' into develop

Version 0.4.3
Merge tag '0.4.4' into develop

Version 0.4.4
feat: source/target subgraph
fix: missing HTML escapes
fix: T comparisons
feat: crop() support any TAnchored
fix: remove character "&" for IPython SVG
fix: missing pygraphviz dependency for IPython SVG
doc: CHANGELOG
Merge branch 'release/0.4.5'