calfem-3.6.9

Minor bugfix in vis_mpl

What's Changed

• Merge pull request #67 from CALFEM/develop by @jonaslindemann in #68
• Develop by @jonaslindemann in #71
• Sync develop and master. by @jonaslindemann in #72
• Merge pull request #72 from CALFEM/master by @jonaslindemann in #73
• Merge doc settings from master. by @jonaslindemann in #74
• Develop by @jonaslindemann in #77

Full Changelog: v3.6.8...v3.6.9