Pyaerocom

Compared to the recent release v0.7.1, this release only comprises changes related to the library installation (both from source and using conda) and some improvements and bug fixes related to how pyaerocom sets up the output directories (e.g. cache directory) when imported.

This release does not include many new features but rather significant improvements in the user-friendliness and flexibility.

Main improvements include (for details see [changelog](https://github.com/metno/pyaerocom/blob/master/changelog/changelog_v0.6.3_v0.7.0)):

- Improved setup of Config class (``pyaerocom.const``) for different path environments (including bug fixes)
- leading to a more flexible and faster import of pyaerocom
- Improved handling and flexibility of gridded data that is not prepared following the AeroCom standards
- Much improved reading and processing of EBAS data (and ungridded data in general, e.g. EBAS SQL constraints can now also be provided in ``ReadUngridded.read()``)
- Some new methods and bug fixes in ``UngriddedData`` class
- pyaerocom can now be installed via conda (see [README](https://github.com/metno/pyaerocom))

First release of pyaerocom. For an overview of relevant features and usage, see [introduction tutorial](https://github.com/metno/pyaerocom/blob/master/notebooks/tut00_get_started.ipynb).

**Remarks**

- Not yet ready to be used on Windows machines.
- For data access, please [see here](https://wiki.met.no/aerocom/data_retrieval) or contact us.
- Python 3 only