Implement EBV dust attenuation corrections on derived properties

[astrochun]

E(B-V) is now determined using the analysis.attenuation modules. It is implemented in a number of functions and other modules. However, it has not been fully integrated within MSC.

Here are the needed steps:

• [X] Update ratios.flux_ratios to have HgHb and HdHb for key-value pairs [b05da5e]
• [x] Update error_prop.fluxes_derived_prop to utilize EBV inputs. Call attenuation.compute_EBV using fluxes_ratios_dict inputs (see above)
• [x] Update temp_metallicity_calc.metallicity_calculation to have option EBV input [f32e916]
• [x] Switch temp_metallicity_calc.R_calculation to have optional EBV input [096b567, 8fef05a]

[astrochun]

Closing this issue since #67 is the extended version.