Flow analysis: Function for charged particle angles
Flow analysis: Function for charged particle angles

'Cumulants' module currently contains only the function
for collecting charged particle angles in an event.

Actual computation of v_n{X} is done with external hic module.

Signed-off-by: Jussi Auvinen <16b8c81f9479dec4f5eedf7ae5a2413c6a10bc13@phy.duke.edu>

jauvinen/hybrid-model-analysis