getClosestToTime: Get a value from a time
In mickash/Adaptive-Bayesian-Networks: Adaptive Bayesian Networks.

Get the value in column col that is in the row whose timeCol timestamp is closest but prior to time from table.

1 2	getClosestToTime(cn, table, time, col, timeCol = "time", prior = T, secondaryOrder = NULL)

`cn`	An open RODBC connection
`table`	The table name
`time`	The time the entry should be closest but prior to/after
`col`	The column of the entry to return
`timeCol`	The column where the time stamp to compare is.
`prior`	If the compared value must be prior to (T) or after (F)
`secondaryOrder`	A secondary column to order on.