create_wvar: Create a 'wvar' object
In wv: Wavelet Variance

Structures elements into a wvar object

1	create_wvar(obj, decomp, filter, robust, eff, alpha, scales, unit)

`obj`	A `matrix` with dimensions N x 3 that contains Wavelet Variance, Lower CI, and Upper CI.
`decomp`	A `string` that indicates whether to use a "dwt" or "modwt" decomposition.
`filter`	A `string` that specifies the type of wavelet filter used in the decomposition.
`robust`	A `boolean` that triggers the use of the robust estimate.
`eff`	A `double` that indicates the efficiency as it relates to an MLE.
`alpha`	A `double` that specifies the significance level which in turn specifies the 1-α confidence level.
`scales`	A `vec` that contains the amount of decomposition performed at each level.
`unit`	A `string` that indicates the unit expression of the frequency.