import make path
pseudo code and reorganizing
rename main
change default rv error to 5 km/s
newline
rearrange
remove model_parameter method to LM10
need line for input file
move parameters for potential
various simplifications
started working on read_hdf5 function
added coords attribute to particle
added observed particle
change name of data set
remove extraneous __all__
add observed particle to all
if error in hdf5 file, read observed particle
parse errors correctly