Changelog for radium-0.4

Version 0.4 * Added parser and writer for SMILES format * Merged project radium-formula-parser. Added Condensed formula parser Version 0.3 * Added electronegativity and ionization energy for all elements Version 0.2 2014-09-17 * Added formula parser Version 0.1 2014-09-16 * Added calculation for valence electrons and bounds