1.1: NetworkX 2.2 support

• Adds support for newer NetworkX (2.2).
• Simplify the requirements file.

1.0.2: Bugfix release

Bugfix release:

• Handle missing or wrong link capacity information gracefully.
• Add capacity to string output for 100Gbit links.
• Remove old (deprecated) matplotlib code that broke plotting on some newer systems.

1.0.1: Bugfix release

Bugfix release.

• Fixes bug when undoing a simulated router failure.