reorganize to src
update index
Revert "delete csv and xlsx"

This reverts commit b79daf05a16021a786309a8b5f7a94801ba120bc.
Revert "Revert "delete csv and xlsx""

This reverts commit 484ae4d7b82ddb6ed04c1163cdd26d3b4c2f4800.
Revert "reorganize to src"

This reverts commit 186d572546f36e40da380ada5029d6f80029a37d.
Revert "update index"

This reverts commit a022e4489216f815947b9278678b27742b40e3f7.
fixed src JSON problem
reorganize fns
main.js move
basic styling (bootstrap)