Test time finished

[kaizhu256]

this pr will

1. prominently print time-finished after running npm-test, to detect performance regressions

2. cleanup jslint's devops/ci code for re-use in other projects:

   • ci - bugfix - fix ci-shell-function shGithubFileUpload unable to upload new asset
   • ci - auto-create asset_image_logo_512.png from asset_image_logo_512.html
   • bugfix - fix shell-function shGithubCheckoutRemote not able to checkout trusted-files in non-alpha branches
   • jslint-ci - revamp auto-updating and add shell-function shGithubCheckoutRemote