Fix version for readability and install additional materials to 'share/lammps'
Move head and url to git
Fix goofy way of writing HOMEBREW_PREFIX/share/lammps in caveats
Merge branch 'master' of github.com:scicalculator/homebrew-lammps

* 'master' of github.com:scicalculator/homebrew-lammps:
  Add caveat about non-homebrew python