Storage of initial conditions

[fding]

Store the states of the solar system in a file rather than in the code and save more states of the solar system (like, the state of the solar system on every new year from 2000 to 2030, on every new year of new decades from 1800 to 2200 (1800, 1890, etc), and every century from -1000BC to 4000AD; this can be up to debate). Ideally, these should be stored in .py files, with parsing options available for csv files.