Installation instructions error out with no metaconfigure folder

[partofthething]

I had the following troubles compiling NJOY21. Looks like the metaconfigure folder is missing.

nick@box:~/code$ git clone https://github.com/njoy/NJOY21.git
Cloning into 'NJOY21'...
remote: Enumerating objects: 116, done.
remote: Counting objects: 100% (116/116), done.
remote: Compressing objects: 100% (83/83), done.
remote: Total 17600 (delta 42), reused 79 (delta 23), pack-reused 17484
Receiving objects: 100% (17600/17600), 174.99 MiB | 33.76 MiB/s, done.
Resolving deltas: 100% (9438/9438), done.
Updating files: 100% (299/299), done.
nick@box:~/code$ cd NJOY21
nick@box:~/code/NJOY21$ wget https://raw.githubusercontent.com/njoy/signatures/master/NJOY21/1.1.0-NJOY21.json
--2020-12-02 16:30:15--  https://raw.githubusercontent.com/njoy/signatures/master/NJOY21/1.1.0-NJOY21.json
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 151.101.0.133, 151.101.64.133, 151.101.128.133, ...
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|151.101.0.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1002 [text/plain]
Saving to: ‘1.1.0-NJOY21.json’

1.1.0-NJOY21.json      100%[===========================>]    1002  --.-KB/s    in 0s      

2020-12-02 16:30:15 (18.1 MB/s) - ‘1.1.0-NJOY21.json’ saved [1002/1002]

nick@box:~/code/NJOY21$ ./metaconfigure/fetch_subprojects.py 1.1.0-NJOY21.json
bash: ./metaconfigure/fetch_subprojects.py: No such file or directory

[partofthething]

To be fair, if I just ignore the error and continue with the installation instructions it does build successfully. So maybe just add a note that this folder is only relevant for NJOY2016 (if that's the case)?

[jlconlin]

@partofthething We recently changed the build system and thus the instructions for building. Please see https://docs.njoy21.io/install.html for new instructions