Implementation of Excel HYPERLINK function.
In Excel this function has special behaviour - it causes the displayed cell value to behave like a hyperlink in the GUI. From an evaluation perspective however, it is very simple.
Syntax:
HYPERLINK(
link_location, friendly_name)
link_location The URL of the hyperlink
friendly_name (optional) the value to display
Returns last argument. Leaves type unchanged (does not convert to {@link org.apache.poi.ss.formula.eval.StringEval}).
@author Wayne Clingingsmith