FreeFem: baixar versions anteriors

Important changes:
- FreeFEM can now run Markdown (.md) files as well as .edp files. Markdown can be used to document your FreeFEM scripts (see for example the .md files in the examples/examples directory). When running a .md file, FreeFEM will execute the code contained in the FreeFEM code blocks, delimited by
```freefem
[freefem code]
```
Documented Markdown examples in the distribution can be viewed on the documentation website (toggle Search in examples). Markdown can be previewed with e.g Visual Studio Code, with the FreeFEM VS Code extension providing syntax highlighting for FreeFEM code blocks.
- add command md2edp to extract freefem code form Markdown file.
- PETSc 3.22.2
- move the plugin msh3 in kernel , so remove all load "msh3" in all examples and .idp files
See CHANGELOG 4.15 for more detail
Remark,a small error has slipped into the version number in version 4.15 : the name of the version is 4.14 ( ... git v 4.15...) on apple silicon and intel mac version., not 4.15 ( ... git v 4.15...) , sorry, I will correct soon.
The new Mac version (develop) works after security authorization (see README.md)
(see the short movie https://www.youtube.com/watch?v=SEF4PAkR51g to understand howto do )
if you do not succed please
send me a Mail to: frederic.hecht@sorbonne-universite.fr.

[4.14]
Added
- Finite element BDM2 and BDM2ortho in test, Bug in BDM2ortho corrected the 4 sept 2014 in version: v4.13-130-g1af52457
- Conversion of matrix or transpose of matrix in int[int][int] array to get the structure of sparse matrix.
see tutorial/sparse-matrix.edp example at end

matrix A = va(Ph,Vh);
int[int] a = A, at= A';

- a meshL finite function can be see as real function with 1, or 2 parameters

meshL ThL = segment(10); fespace VhL(ThL,P1); VhL u= x;
cout << u(0.5) << endl;
cout << u(0.5,0) << endl;

- Exemple to code convolution of 2 function with one with a small support
too be not to expanxive
see tutorial/Convolution-Sample.edp example
- Support for dense blocks in PETSc matrices
- GenEO for saddle-point examples with PCHPDDM in PETSc
- Distributed ParaView output on meshS
- Interface to mmg2d for two-dimensional mesh
- Support for Mmg parameters localParameter, -nosizreq, -hgradreq`
Changed
- PETSc 3.20.2
Deprecated
Removed
Fixed
- bug in P3pnc3d in vectorial case (thank to loic.balaziatchynillama@cea.fr )
- in segment(10,region=1,label=ll); region is now used..
Sorry the ARM version (Apple-Silicon) was wrong before due to mistake in brew library
(need to install brew gfortran)The new Mac version (develop) works after security authorization (see README.md) if not please
send me a Mail frederic.hecht@sorbonne-universite.fr.Remarque: The dev file are the current develop version.

What's Changed
- PETSc 3.18.0 by @prj- in #238
- Fixed a bug of setenv in shell.edp by @zhaog6 in #232
- Version v4.12 by @prj- in #244
- Version win64 for x86 not really tested
- FreeFem++-4.12-win11-x64 tested and compile under window 11 x64
- the Apple-M1 version is correct but warning on Ventura (13.0) see menu Security and confidentiality in Preferences System to unlock the application.