v0.2.1 minor twiks in description

Signed-off-by: Serguei Sokol <sokol@insa-toulouse.fr>

DESCRIPTION

 Package: gmresls
 Title: Solve Least Squares with GMRES(k)
-Version: 0.2
+Version: 0.2.1
+Date: 2024-10-15
 Authors@R: 
     person("Serguei", "Sokol", , "sokol@insa-toulouse.fr", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0002-5674-3327"))
-Description: Solves a least squares system Ax=b (dim(A)=(m,n) with m >= n) with a preconditioner B: BAx=Bb (dim(B)=(n,m)). Implemented method uses GMRES(k) with callback functions, i.e. no explicit A or B are required. GMRES can be restarted after k iterations.
+Description: Solves a least squares system 'Ax~=b' (dim(A)=(m,n) with m >= n) with a precondition matrix B: 'BAx=Bb' (dim(B)=(n,m)). Implemented method is based on 'GMRES' (Generalized minimal residual, <doi:10.1137/0907058>) with callback functions, i.e. no explicit A, B or b are required.
 License: GPL (>= 3)
 Encoding: UTF-8
 Roxygen: list(markdown = TRUE)
 RoxygenNote: 7.3.2
 Suggests: 
     RUnit
+BugReports: https://forgemia.inra.fr/mathscell/gmresls/-/issues

NEWS.md

-## v1.0.0 2024-??-??
+## v0.2.1 2024-10-15
 
  - initial R implemetation

README.md

 # gmresls
 
-<!-- badges: start -->
-
-<!-- badges: end -->
-
-The goal of gmresls is to solve a least squares problem Ax\~=b for which the matrix A is not explicitly known. We suppose that it exists a preconditioner B such that BA is somewhat close to I (identity matrix of appropriate size). This preconditioner B does not have to be explicit either.
+The goal of gmresls is to solve a least squares problem Ax\~=b for which the matrix A and may be vector b are not explicitly known. We suppose that it exists a precondition operator B such that BA is somewhat close to I (identity matrix of appropriate size). This operator B does not have to be explicit either. To simulate A, B and b actions, user have to supply callback functions f_resid() and f_BAx(). The algorithm is based of GMRES (Generalized minimal residual)
 
 ## Installation
 
@@ -30,3 +26,14 @@ f_BAx=function(x,...) with(list(...), crossprod(A, A%*%x))
 x=gmresls(f_resid, f_BAx, A=A, b=b)
 stopifnot(all.equal(c(x), c(qr.solve(A, b))))
 ```
+
+### Legal information
+
+Author: Serguei Sokol (INRAE/TBI/Mathematics cell)
+
+Copyrights 2024, INRAE/INSA/CNRS
+
+License: GPL (>=3)
+
+Issue reporting: https://forgemia.inra.fr/mathscell/gmresls/-/issues
+