find_in_row/col

[DWiechert]

It would be nice to have functions on the Worksheet which allow for find/findall that only search in a given column/row.

Example worksheet:

A	B	C
foo	bar	something
bar	something2	foo

Example queries (row/col is zero based):

sheet.find_in_row("foo", 1)
sheet.find_in_col("bar", 0)

Expected results:

Cell(row = 1, col = 2)
Cell(row = 1, col = 0)