kpmap_to_colmap does not save intrinsics

[lyehe]

The camera model is pinhole even there is distortion.

[lyehe]

Also, output to .bin would be a nice option to have.

[willdzeng]

Thanks for the suggestion, we will add it in our next release 0.1.2

[willdzeng]

Hi @lyehe

Please see release 0.1.2 09bdde5
Let us know if that solves the problem thanks!