+ Rewrote package title and description to make it clearer
+ Fleshed out the README
+ bumped minor version number
+ added GPL-3 LICENSE file
+ removed what must have been unnecessary package dependencies
from imports (knitr, xtable)
+ added xtable to suggests field instead (seems to be enough)
+ deleted commented out, long-deprecated, functions nm2eV() and
eV2nm()
+ fixed link to mirrored repo on git.solarchemist.se
