Mendeleev

-------------------

Features added
^^^^^^^^^^^^^^

* Extended the list of options for calculating Mulliken electronegativities in
``en_mulliken``
* Added ``electrons_per_shell`` method
* Added a function to calculate linear interpolation of radii required for
calculation of Sandersons electronegativity
* Added hybrid attributes ``electrons``, ``protons``, ``neutrons`` and
``mass_number``

Bug fixes
^^^^^^^^^

* Changed the type of the ``melting_point`` from ``str`` to ``float``

-------------------

Features added
^^^^^^^^^^^^^^

* Instead of ``covalent_radius`` added ``covalent_radius_2008`` and
``covalent_radius_2009``
* Instead of ``electronegativity`` added ``en_pauling`` and ``en_mulliken``
* Added a method for getting ionic radii
* Improved the method for calculating the nuclear screening constants
* Added ``ElectronicConfiguration`` class initialized as ``Element`` attribute
* Added nuclear screening constants from Clementi and Raimondi
* Added a method to calculate the absolute softness, absolute hardness and
absolute electronegativity
* Added ``get_table`` method to retrieve the tables as ``pandas``
``DataFrames``

Bug fixes
^^^^^^^^^

* Added missing electronic configurations
* Converted ionic radii from Angstrom to pico meters

-------------------

First tagged version with the initial structure of the package and first
version of the database and the python interface