Merge pull request rpng#232 from rpng/develop_v2.6

Develop v2.6 - Dynamic Initialization and Async Publishing

Merge pull request rpng#209 from rpng/develop_v2.5

Development v2.5 - New Config System, ROS2 support, and many other changes!

Merge pull request rpng#186 from rpng/develop_v2.4

Development v2.4 - Camera classes, Masks, Formatting and Smaller Fixes

Merge pull request rpng#117 from rpng/develop_v2.3

Development v2.3 - Memory Management, Active Feature Publishing, Small Fixes

update readme

Merge pull request rpng#66 from rpng/pose_graph

Development v2.1 - Secondary Pose Graph Support

Merge pull request rpng#45 from rpng/develop_v2.0

Development v2.0

Fixed - Theme line color