Mpalmsten kalman filter demo update

[mpalmsten]

Added some code to plot Phase 2 cBathy results before doing Kalman filter in the Kalman filter demo.

[KateBrodie]

@mpalmsten i will test now, but can you resubmit to merge into development :) looks like the request is to merge into master...

[KateBrodie]

@mpalmsten this worked for me and I would approve but you just need to change the pull request base branch to be development!