[wip] logging in ConsIndShockModel

[MridulS]

supersedes #701

• need to define the logging levels in documentation, with this design we can have 3 level verbosity. [WARNING, INFO, DEBUG] (controlled by the function argument verbose, which can take in 1, 2, 3 as levels)
• by default, logger will be at WARNING

[MridulS]

different control over logging:

model = PerfForesightConsumerType(verbose=(0/1/2/3) ....)

model.checkConditions(verbose)

model.checkRIC(verbose)

from HARK import disable_logging
disable_logging() # no logging