Write out table of beginning and end years

Using a similar scheme as in previous functions
where an empty vector is set, it is filled with
numerical objects, then written as plaintext to the
working directory.
Read start/end year values from plaintext file

Using a 'read.table' function with some others allows
for the setting of "NOAA_start_year" and
"NOAA_end_year".
Read in necessary data for function

Reading in year start/end values and table of selected
stations, both from the working directory.
Remove complete path from 'read.csv' argument

Since all files are in the working directory, there
is no need to supply a full path.