Discussion: Level of parameters

Created by: peilingjiang

As mentioned in EasyEyes/control-panel#1, there are two levels of parameters: experiment (e.g., if use RC), block (e.g., if display fixation). Experiment-level params should be parsed at the beginning of the experiment and block-level params should be parsed at the beginning of each block (now within every trial). Should we add an extra column in the input sheet to identify the level of params?