check current column from line above, if cursor is at the last line
new public function CSVSum()
do not read users .vimrc and .viminfo when creating vimballs
fix stupid typos
if no column is given and line is empty, use 1 instead of 0 for column number
better check, from where to fetch the line when determining the current column
Merge branch 'master' of https://github.com/chrisbra/csv.vim