NoiseModel -> ErrorModel + definition
'Ready to release' curation status
Merge pull request #195 from cmaumet/NoiseModel

Definition of "Noise Model" -> "Error Model"
Noise -> Error + definitions
Merge pull request #193 from cmaumet/noiseDependenceTerms

Defintion of "noise dependence" terms -> "error dependence"
noiseVarianceHomogeneous -> errorVarianceHomogeneous + definition