Provide project templates

# Requirements
The following [Basalt project](https://github.com/tristan0x/basalt/issues?q=is%3Aopen+is%3Aissue+project%3Atristan0x%2Fbasalt%2F2) should be completed first.

# Deliverables

2 project templates: one for pure Python projects and the other for C++/CMake

## Pure Python project

* Provide instructions to generate a Python project with pyscaffold.
* Provide guidelines to create cython functions if necessary.

### Use case
The main target is to create Python packages (source distribution or wheels)

### References
Interesting work made by NSE team to [build Python wheels](https://bbpteam.epfl.ch/project/spaces/pages/viewpage.action?pageId=36340234) (still work-in-progress)

## C++ project

Create a cookiecutter project inspired by basalt.

### Input parameters

| Parameter | Default Value |
| --------------------- | ------------------ |
| team name | HPC
| team_email | bbp-ou-hpc@groupes.epfl.ch
| project_slug | foo
| python_bindings | y

### Third parties
The 3rd parties libraries below should be ready to be used. single-header releases are bundled in the project, the other provided as git submodules:
* hpc-coding-guidelines
* From [Tooling](https://github.com/BlueBrain/hpc-coding-conventions/blob/master/cpp/Tooling.md#as-git-modules-or-directly-bundled):
* Catch2
* CLI11
* {fmt}
* Google benchmark
* spdlog
* nlohmann/json
* gsl-lite

### Python bindings
If *python_bindings* is enabled, then the generated project would be enriched with pyscaffold goodness (tox.ini, setup.py, ...) and pybind11.