Updated CNS installation instructions

[amjjbonvin]

You are about to submit a new Pull Request. Before continuing make sure you read the contributing guidelines and that you comply with the following criteria:

• [ ] You have sticked to Python. Please talk to us before adding other programming languages to HADDOCK3
• [x] Your PR is about CNS
• [ ] Your code is well documented: proper docstrings and explanatory comments for those tricky parts
• [ ] You structured the code into small functions as much as possible. You can use classes if there is a (state) purpose
• [ ] Your code follows our coding style
• [ ] You wrote tests for the new code
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• [ ] -test.cfg examples execute without errors. Inside examples/ run python run_tests.py -b
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"This PR improves the readablity of the CNS installation instructions and also changes the folder structure of the patched CNS files" @rvhonorato

[rvhonorato]

ping @VGPReys @AnnaKravchenko

[amjjbonvin]

why is there a \ sign before the cp command ?

Basic Linux, with the \ is uses the basic command, without any option possibly defined in an alias.

[amjjbonvin]

Also the [bis] statement is quite confusing

Again, Linux shell selection syntax: It will select any file or directory starting with a: b, i or s

[amjjbonvin]

Does work on my Mac under tcsh, but not under bash…

And there are some character issues for ‘ and #

Should we add sed -i '' 's@_CNSsolvelocation@'"$PWD"'@‘ cns_solve_env as an alternative to installing gnu-sed on Mac? But also idk if it works in general or only ‘on my machine’

[AnnaKravchenko]

Yeah, then let’s just keep it as is. After all it’s trivial to make changes manually.

Does work on my Mac under tcsh, but not under bash… And there are some character issues for ‘ and # … Should we add sed -i '' 's@_CNSsolvelocation@'"$PWD"'@‘ cns_solve_env as an alternative to installing gnu-sed on Mac? But also idk if it works in general or only ‘on my machine’