Merge pull request #6 from srichers/master

added flag to apply kirchoffs law to pair creation emissivities
*added support structure for Frank Timmes' Helmholtz EOS.
	-Download Helmholtz EOS from http://cococubed.asu.edu/code_pages/eos.shtml into src/other_eos, unzip & tar.
	-Set HELMHOLTZ_EOS=1 in the make.inc file
	-Compile with make ../point_example_with_HelmholtzEOS from the src directory.
	-See point_example_with_HelmholtzEOS.F90 for implementation details.
Merge branch 'master' of github.com:evanoconnor/NuLib