Port the BOP-Kotlin functions to Registry-Python

[ingenieroariel]

BOP API implementation can be found at:

https://github.com/dsmiley/hhypermap-bop

The idea is to mirror the definition and implementation for time based search, spatial based search, etc. That code does not have a LICENSE file so it's better to check with David and Ben about it before starting the work.

Work can be divided in three steps:

• [ ] Implement Python functions
• [ ] Write unit tests for the Python functions
• [ ] Implement Swagger Interface

[ingenieroariel]

@panchicore