evaluateModel: Evaluate the N-gram model
In justinnafe/NextWord: Provides tools to help predict the next word

Evaluate the model with preferably unseen text and indicate to the evaluation if the text has already been cleaned and tagged.

1	evaluateModel(model, input, cleanedPosText = FALSE)

`model`	A list of N-gram data.frames sorted in descending order based on the probability of the token and POS sequence occuring.
`input`	Character vector of words.
`cleanedPosText`	Boolean indicating if the text has already been cleaned and tagged with POS.