Can't read old TAQ files

[davclark]

taq2h5 EQY_US_ALL_BBO_20111101.zip results in ValueError: no field of name Retail_Interest_Indicator_RPI.

Why don't our tests catch this? Well - we don't have a test datafile for each epoch. @yangraymond I guess you won't have time to create such a thing before you go?

[davclark]

Bug is "fixed" but leaving this open until there's a test file.