Update CHANGELOG.md

CHANGELOG.md

@@ -4,24 +4,31 @@ FreeSASA uses semantic versioning. Changelog added for versions 2.x
 
 ## 2.1.0-beta
 
+The new features in this release were created on initiative by and in collaboration
+with [Danny Diaz](https://github.com/danny305).
+
 ### Added
 
-- Support for mmCIF input with the CLI option `--cif`.
+- Support for mmCIF input with the CLI option `--cif`. 
   - The CLI was ported to C++ to allow using Gemmi for CIF import.
   - Gemmi is imported as a git submodule, see README for details.
   - A test runner was added to verify that CIF and PDB input files
     give the same result.
   - The C API does not support CIF for now (this would require conversion to C++).
 - Add output option `--format=cif` that can be used when input is mmCIF.
   See documentation for an example.
+- Added VdW-radii for all elements. 
+  - Using values from Gemmi when missing in paper by Mantina et al.
+  - Correct Mg radius from 1.74 to 1.73 Å.
 
 ### Fixed
 
 - Fix bug in JSON output where relative SASA for amino acids without sidechan
   were written as `NaN`, which is not valid JSON. These values are now
   simply skipped.
-- Fix bug where elements with H or D as second element, such as CD, were classified
+- Fix bug where elements with H or D as second letter, such as CD, were classified
   as hydrogens.
+- Change some type definitions to be more C++ friendly.  
 
 ## 2.0.3