Add Bader analysis.
dev v2.6.5b
Modify changelog. [no-ci]
Simplify bader caller.
Fix link.
Significant improvements to bader analysis (charge transfer calculation
implemented).

Bug fixes for POSCAR parsing when the title line is empty.
Update change log.
Add rmul operator for Compositions.
ADd unittest for rmul.
Update available aliases.
Add alias for MPRester.
Improve README and installation. Add bader optional requirement.
Add license.
V2.6.5 release.
Merge remote-tracking branch 'mpmaster/master'
 Code cleanup