Move timeInfo() out of the package

[spencerpease]

Motivation

The function timeInfo() doesn't have any inherent dependence on the ws_monitor data PWFSLSmoke was created to work with. If we ever needed to use this function in another context (let's say working with raw air-sensor data), it would be convenient if was available from a smaller, more generalized package.

Idea

timeInfo() should exist in some *utils package, either MazamaSpatialUtils, MazamaCoreUtils, or some other "time utils" package.

Potential Difficulties

This function does have a dependency on MazamaSpatialUtils and the maptools package. If this function gets moved somewhere, it still needs to have access to these packages.