set up tbeam branch, completely untested!
remove the last bits of the interaction type
update from benpalmer1983@gmail.com
first part of changes to tbeam implementation, currently not working
fix dummy and limiting constraints for tbeam, still not working properly
fix tbeam for tabulated and analytic potentials
remove PARABOLA and WZERO from force_eam
fix tbeam header in format3 and 4 output files
Merge branch 'tbeam'

Conflicts:
	potfit.c