timothydmorton/isochrones: v1.0 Initial release

First release of version 1.0. Significant changes from previous versions. MIST models are now available (much broader coverage in mass, age, and metallicity), in addition to Dartmouth. Book-keeping is much more organized with the new ModelGrid object, which takes the model grids exactly as published and does all the parsing as part of the package. This should make it easier to extend to using other model grids. BinaryStarModel and TripleStarModel no longer exist; now you can just provide an N=2 keyword argument to StarModel. Support for non-trivial collection of photometric bands for multiple stars: e.g., pair of stars unresolved in 2MASS but resolved in high-resolution imaging. Isochrone object can now predict density, nu_max, and delta_nu, to help support transit host stars and asteroseismic stars, where such data is available