Pymatgen

* Improved chemenv parameters and bug fixes (David Waroquiers).
* Improved Qchem IO (Shyam).
* Improved interfacial reactions.
* local_env update (Nils).
* Improved ABINIT support (gmatteo).
* Misc bug fixes.

* Improvements to local_env (Nils)
* Term symbols for Element (Weike Ye).
* Timeout for enumlib (Horton).

* Phonon plotting and analysis improvements (Guido Petretto).
* Voronoi site finder (Hanmei Tang)
* Some bug fixes for Gaussian (Marco Esters)
* Misc improvements.

* Added detailed Shannon radii information and method.
* Magoms for lanthanides (Weike Ye)
* Chemenv improvements (David Waroquiers)
* Ewald summation improvements (Logan Ward)
* Update to ABINIT support (G Matteo)

* Add optical absorption coefficient method
* Improve plot_element_profile

* Deprecated methods cleanup for 2018. Note that this may break some legacy
code. Please make sure you update your code!
* Better dielectric parsing for VASP 5.4.4 to include both density-density and
velocity-velocity functions.
* Orbital-resolved COHPs support (Macro Esters)
* Convenient plot_element_profile method in PDPlotter.
* Input set for SCAN functional calculations.
* Misc bug fixes and code improvements.