Print cell array of strings to file

function to print a cell array of strings to a csv file. Inputs are a file identifier and array.

function to print a cell array of strings to a csv file. Inputs are a file identifier and cell array. No error handling or checking of inputs. It also includes a fputl function which is not available (yet) in matlab. This last function dumbly prints a string to a file while appending a newline character.