Merge pull request #12 from jogie/downloadscript

add script for download external directory
Merge remote-tracking branch 'upstream/master'
re arrange code blocks
taking argv
modify debugging comment
change argc req
fix eval, need more fix though
Merge pull request #13 from tttor/eval

fix eval, to be continued ...
add csv_read()
Merge branch 'csv-read'
Merge remote-tracking branch 'upstream/master'