calculate_rel_consistency: Calculate Consistency of Logratio Data
In warrenmcg/absSimSeq: RNA-Seq Simulation with Absolute Counts

This function uses calculate_consistency to determine if there is consistency in the perceived fold changes after logratio transformation of the absolute copy numbers and the relative TPMs. In theory, all targets should show consistent behavior.

1	calculate_rel_consistency(abs_cns, rel_tpms, denom = NULL)

`abs_cns,`	an N x 2 matrix or data frame with expected absolute copy numbers in each of two conditions for N targets
`rel_tpms,`	an N x 2 matrix or data frame with expected relative TPMs of N targets in each of two conditions
`denom,`	the name(s) of the target(s) to be used as the denominator for the additive logratio transformation

a list with three members:

alr_means: the ALR transformed values of the copy numbers
alr_diff: the difference of logratios between the two conditions of the ALR transformed copy numbers
alr_consistency: the result from calculate_consistency