update README to reflect completed tasks: modularization and explicit interfaces

Author: HugoMVale

README.md

@@ -17,10 +17,10 @@ The first version of the library, named HOMPACK, was originally released in 1987
 
 * [ ] Conversion from fixed-form (`.f`) to free-form (`.f90`).
 * [ ] Conversion from upper case to lower case.
-* [ ] Modularization.
+* [x] Modularization.
 * [ ] Removal of `DATA` statements, labeled do loops, and (most) `goto`s.
 * [ ] Addition of `intent(in/out)` to all procedures.
-* [ ] Addition of explicit interfaces to BLAS/LAPACK routines.
+* [x] Addition of explicit interfaces to BLAS/LAPACK routines.
 * [ ] Implementation of a C API.
 * [x] Automatic code documentation with FORD.
 * [ ] Python bindings, available in the companion repo [hompack-python](https://github.com/HugoMVale/hompack-python).