update gitignore
delete useless files
rename
simple pages
delete useless
use global calculate
delete step4
add calculate pre page
typo
add alert info
add alert info check
refactor calculate task
Merge pull request #56 from tianweidut/refactor-calculate

refactor calculate
cleanup
Merge pull request #59 from tianweidut/clean-ui

Clean ui
add admin ui
fix show and hide js
Merge pull request #61 from tianweidut/fix-pre

Fix pre