speed improvement when using wildcards or DREIDING

The changes in this commit can significantly increase the speed of moltemplate.sh when the user's LT files contain wildcard characters ('*' characters) in any of the LAMMPS coeffs or coeff commands. In particular, simulations using the DREIDING force field ("dreiding.lt", which uses wildcard characters frequently) should be faster to prepare. Some coarse-grained force fields also make frequent use of wildcard characters.