updates error checking for reading in parameters #109

Job	Run time
Check file changes	17s
Test on Mac	3m 30s
Test on ubuntu-latest	1m 7s
Test on ubuntu-20.04	49s
Test Intel on ubuntu-20.04	18m 4s
Test run example 0 - make tests	0s
Test run example 10 - simple_topography_and_also_a_simple_fluid_layer debug double_precision	0s
Test run example 11 - tomographic_ocean_model	0s
Test run example 1 - benchmark claerbout kernel acoustic	0s
Test run example 12 - Marmousi2	0s
Test run example 13 - Gmsh w/ Stacey	0s
Test run example 2 - benchmark claerbout kernel elastic P-SV	0s
Test run example 14 - EM	0s
Test run example 4 - benchmark claerbout kernel acoustic-elastic	0s
Test run example 3 - benchmark claerbout kernel elastic SH	0s
Test run example 5 - moving sources	0s
Test run example 6 - anisotropy	0s
Test run example 7 - Industrial_Format_SEP	0s
Test run example 8 - axisymmetric_case_AXISYM_option	0s
Test run example 9 - simple_topography_and_also_a_simple_fluid_layer debug	0s
	23m 47s

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