updated the LOPLS force field file ("loplsaa.lt")

The new version of "loplsaa.lt" includes much more clear atom type descriptions (for the atoms described in the 2015 LOPLS paper, at least).

I also removed some (hopefully) unnecessary and confusing atom types (such as 81LL, 118L, 718LL).

The moltemplate.sh program has not been modified, but I updated the version info anyway. (I had to change the version number of the project in order to be able to upload a new version to pypi.)

Please let me know if I have made any mistakes in the process.
-Andrew