Add new repository for coordinate transformation and its data

Aim of this repository are:

• to provide base code modules (class/API) on conversion among various coordinates, both their functions (e.g. polynomial) and parameters
• to store analysis results from simulation or modeling as reference

Also it is better to provide:

• test data set and unit test (using test data set) of code modules for CI
• jupyter notebook sample

This could be used from AG coordinate converter or fiber allocation software.

rhl I don't think we should merge this kind of items into datamodel, but be better to have separated. Is it ok for you on management point of view?
yuki.moritani Could you help once we will have this repo?
naoyuki.tamura Let us know if you have any comment/suggestion on project management aspect.
Kiyoto Yabe Just let you know on this.