Create PrrtChannelParameters class

The class should store (for both _fwd and _bwd):

• Packet loss rate in percent. (property loss_rate_[...])
• Propagation round trip time in seconds. (property rt_prop_[...])
• Bottleneck data rate in bits per second. (property btl_dr_[...])

It should provide computed properties:

• Bandwidth-delay product in bits (btl_dr * rt_prop for both directions).
• Minimal redundancy information in percent (ri_min()).
• Minimal redundancy information given residual error in percent (ri_min_residual(applicationParam.max_loss)).

Should come with convenience methods:

• __str__
• __repr__
• __eq__

It should also nicely serialize to a 3-tuple to be used in Numpy arrays.

Python properties: https://www.programiz.com/python-programming/property