Fix parsing of quantitation files

[AmandaBirmingham]

Handle type of newlines in file created by wetlab (windows, maybe?)

• Without this, receive an uncaught exception when try to upload quantitation file
  Automatically replace "nan" concentrations with 0 when parsing quantitation files
• Without this, nan wells display as white, AND received an error when clicking Confirm

Interpret any values listed as "<0.00" as 0.00
Interpret any values listed as ">(some numeric value)" as "(some numeric value)"
Interpret any values listed as a bunch of question marks (when you overflow the sensor; usually sample being too concentrated) as the highest quantification value in that particular file.

• For all three of these, the wet lab currently does this manually

Raised in shotgun walkthrough 07/31/2018