prop_error: first-order error propagation for simple binary operations
prop_error: add sum and difference
pi0: add more complete analysis for neutral pion
plot_timeseries: add uwerr plots to timeseries
analysis_conn_meson_2pt: adjust mu0.003 implementation to new factoring
outputonline: add some comments
analysis_conn_meson_2pt: adjust fit ranges in driver template
analysis_conn_meson_2pt: represent mul0.0009 implementation as symlink