nicqControl: Function that returns a list of algorithm controls for nicq
In nivm: Noninferiority Tests with Variable Margins

Controls for numeric integration, etc. Mostly used in getfx2 that is called by nicqTest.

Defined as a function instead of a list, so sanity checks can be built in (but none have been included yet).

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nicqControl(rdig = 5, slowint = FALSE, mint = 100, 
    interr = 10^-3,  epsilon=10^(-4), alpha = 0.025,
    tau.conf.level=0.95)

`rdig`	number of digits for rounding, used to eliminate some computer errors. Used in `getimaxpower` called by `nicqTest` when ic="maxpower".
`slowint`	use slow integration for `getfx2`
`mint`	number of summands in numeric integration for `getfx2`
`interr`	tolerance for integration for `getfx2`
`epsilon`	small value to give the range for the uniroot function that calculates the confidence intervals. It searches from -q+epsilon to 1-q-epsilon. Used in `nicq.calc` called by `nicqTest`.
`alpha`	significance level for calculation of `getimaxpower` called by `nicqTest` when ic="maxpower".
`tau.conf.level`	confidence level for tau, where F1(tau)=q. Uses `bpcp` then `quantile.kmciLR`.