Add to .gitignore

Remove *.Rproj files from repo.
Add comment to code

Explains the data composing the vector indices of
the 'define.calmet.domain.out' object.
Add to .gitignore

Ignore any .out data tables written the the working
directory.
Write file with values instead of returning vector

Adopting a different strategy for sharing output between functions. Will choose to save function output
as small text tables in the working directory with
'write.table'.
Modify stop message in 'get.ncdc.history' function

Added a linebreak.
Change routine to check for bounding coordinates

Reworked a conditional in the 'ncdc.station.data'
function that checks whether a domain has been
successfully defined. Now checks whether the output
file from the 'define.calmet.domain' function
exists in the working directory. Also provided a more
helpful stop message.
Remove comments that are no longer relevant

These comments also contained deprecated code.
Let 'subset' function use a file data reading scheme

Read existing file 'define.calmet.domain.out' as a
table, then unlisting, then setting class to numeric,
then, finally, targeting the correct index values.
No need to instantiate this file's contents as an
object.
Change FTP address of NCDC archive

The previous FTP server is still active but will no
longer be updated/maintained.
Add closing bracket to conditional statement