Merge pull request #337 from rpng/develop_v2.7

Develop v2.7 - IMU Intrinsic Support

bump release number

Merge pull request #264 from rpng/develop_v2.6.2

Develop v2.6.2

Merge pull request #259 from rpng/develop_v2.6.1

Develop v2.6.1

Merge pull request #232 from rpng/develop_v2.6

Develop v2.6 - Dynamic Initialization and Async Publishing

Merge pull request #209 from rpng/develop_v2.5

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

Merge pull request #186 from rpng/develop_v2.4

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

Merge pull request #117 from rpng/develop_v2.3

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

update readme

Merge pull request #66 from rpng/pose_graph

Development v2.1 - Secondary Pose Graph Support