Update readme

README.md

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 This `R` library is designed to provide an easy way to extract and manipulate palaeoclimate
 reconstructions for ecological and anthropological analyses. 
 
@@ -32,13 +30,15 @@ devtools::install_github("EvolEcolGroup/pastclim")
 ## Overview of functionality
 
 On its dedicated [website](https://evolecolgroup.github.io/pastclim/), you can find
-Articles giving you a step-by-step [overview of the package](https://evolecolgroup.github.io/pastclim/articles/a0_pastclim_overview.html), and how
-to build and use [custom datasets](https://evolecolgroup.github.io/pastclim/articles/a2_custom_datasets.html). There is also a [cheatsheet](https://evolecolgroup.github.io/pastclim/pastclim_cheatsheet.pdf). 
+Articles giving you a step-by-step [overview of the package](https://evolecolgroup.github.io/pastclim/articles/a0_pastclim_overview.html),
+and a [cheatsheet](https://evolecolgroup.github.io/pastclim/pastclim_cheatsheet.pdf).
 
-Pastclim currently includes data from Beyer et al 2020, a reconstruction of climate based on the HadCM3 
+Pastclim currently includes data from Beyer et al 2020, a reconstruction of climate 
+based on the HadCM3 
 model for the last 120k years, and Krapp et al 2021, which covers the last 800k years.
 The reconstructions are bias-corrected and downscaled to 0.5 degree. More details on these datasets
 can be found [here](https://evolecolgroup.github.io/pastclim/articles/a1_available_datasets.html).
+There are also instructions on how to build and use [custom datasets](https://evolecolgroup.github.io/pastclim/articles/a2_custom_datasets.html).
 
 You can also build the vignettes when installing 
 `pastclim` (note that you will need to have the necessary tools to build vignettes already installed;