Move download script to root directory

[stefsmeets]

This PR moves the download script to the root directory and gives it a more logical name.

[nielsdrost]

I tried to run this script but ran into some trouble.

• This error openssl.ssl.error ('ssl routines' 'ssl3_get_record' 'wrong version number') ESGF/esgf-pyclient#57, solved by adding a few lines at the top to set the SSL version (see issue)
• The config file and dataset.yml locations do not seem to be correctly specified
• I get a "pyesgf.search.exceptions.EsgfSearchException: Error loading available shards" error.

Then I gave up for today ;-)

[stefsmeets]

I tried to run this script but ran into some trouble.

* This error [ESGF/esgf-pyclient#57](https://github.com/ESGF/esgf-pyclient/issues/57), solved by adding a few lines at the top to set the SSL version (see issue)

* The config file and dataset.yml locations do not seem to be correctly specified

* I get a "pyesgf.search.exceptions.EsgfSearchException: Error loading available shards" error.

Then I gave up for today ;-)

Thanks @nielsdrost , good points and it seems like I should have tested this myself first 😅

[stefsmeets]

The esgf issues I cannot help with, but I can make sure that datasets.yml is correctly referenced. Should work as intended now (or at least it does so on my pc).

[bouweandela]

The download script and its configuration file (datsets.yml) belong together, so if you're moving one to the top level, I would also move the other to the top level.

[stefsmeets]

Hi @bouweandela , can you have another look? I think this is ready to merge!

[bouweandela]

Thanks for making the changes, I tried to run the script but it failed on loading the configuration file. I also noticed that the documentation on how run the script in CONTRIBUTING.md has not been updated yet.

[stefsmeets]

Thanks for making the changes, I tried to run the script but it failed on loading the configuration file. I also noticed that the documentation on how run the script in CONTRIBUTING.md has not been updated yet.

Yeah, my bad for not testing if it worked. Should be good now 👍