Mitreattack-python

Features

- Added support for Assets to the `MitreAttackData`, `attackToExcel`, `diffStix`, and `navlayers` modules.
- Updated `navlayers` module to support Navigator Layer File Format version 4.5. [98](https://github.com/mitre-attack/mitreattack-python/issues/98)

Fixes

- Set all columns in Excel files Relationships tabs the same. [136](https://github.com/mitre-attack/mitreattack-python/issues/136)

Features

- mitreattack.stix20.MitreAttackData can now be initialized with a stix2.MemoryStore instead of just a STIX file.

Fixes

- Addressed issue in mitreattack/stix20/MitreAttackData.py which was causing duplicate Group entries. [149](https://github.com/mitre-attack/mitreattack-python/issues/149)
- Updated toSvg() to address an underlying Pillow update. [140](https://github.com/mitre-attack/mitreattack-python/issues/140)
- Fixed issue that caused some relationships to be excluded from the results. [128](https://github.com/mitre-attack/mitreattack-python/issues/128)

Documentation

- Updated documentation to include links to all the latest example scripts.

Fixes

- Downloading STIX in changelog_helper is more resilient

Fixes

- Fix issue with minimum version of drawsvg in setup.py

Features

- Changelog Helper: Ignore order when creating diff
- Changelog Helper: Attempt to download STIX multiple times