First steps as tutorial. Data Sources sub-section done

[emadehsan]

First steps" is now a tutorial that walks the read through the code by doing while making sure that they are exposed to enough CliMetLab APIs that they start to get comfortable and ready to use it.

It assumes not prior knowledge from the reader except basic Python programming. E.g. reader doesn't have to know about GRIB or NetCDF format.

Have not taken away any of previous content. Only modified and added new.

Your feedback and request for modifications are most welcome!

PS:

• The reason I added basic explanations for GRIB, NetCDF etc was so that any user (Python programmer) and not just a meteorologist could understand and get up to speed with CliMetLab

• I pushed the CSV download example to the middle instead of start because it is 34 MB file and takes a while to download on a slower network (like mine). So a new reader can easily get distracted in the meantime

• Removed the links to example notebooks (they were giving 404 anyway) in the table of Data Sources section. As this can overwhelm the new user who is just getting started, with so many links to follow and read.

• Tried to incorporate some important lessons from What nobody tells you about documentation

[FussyDuck]

All committers have signed the CLA.

[emadehsan]

Hi Florian, I've made changes as you suggested. Please feel free to let me know if something else needs to be modified.

In the case of link to test.grib files from ECMWF servers, there was an error, so I didn't change those links.