Multipatch module

[campagnola]

The main purpose of this module is to facilitate patching cells and monitoring cell health when using multiple patch electrodes.

• Allow easy control of multiple manipulators for patching (mostly complete, but see Add reseal button to multipatch module #12)
• Track state of each pipette -- sealing, cell-attached, whole-cell, etc
• Store a log of all pipette state / qc / position data (see Record target positions, surface depth in multipatch module #1, Record image transform for every frame in a recording. #2, Store LED/filter settings with images #3)
• Plot basic QC measurements from test pulse for each pipette -- input/access resistances, holding values, etc.
• Visual alerts when QC values are out of desired range

Current development is in https://github.com/campagnola/acq4/tree/multipatch