add Jcalculator

Add Epoch time
Merge pull request #3484 from vikas5914/master

add Jcalculator
Add npm auto-update
Updated packages via auto-update.js
Merge pull request #3486 from abeMedia/patch-2

Add npm auto-update [author]
Updated packages via auto-update.js
add jquery.tablesorter v2.17.3
Merge pull request #3488 from PeterDaveHello/tablesorter

add jquery.tablesorter v2.17.3
Update README.md
Zap CONTRIBUTING-WIP.md

A fresh start would be best, I think. This is another wall of text.
Remove redundant .less files

.less are source code files for .css - not required or relevant, so
removing.
Remove redundant .scss files

.scss are source code files for .css - not required or relevant, so
removing.
Remove non-cdnjs .gitignore files

Not required.
Remove non-cdnjs .travis.yml files

Not required
Remove redundant .npmignore files
Remove unnecessary non-cdnjs dotfiles
Updated packages via auto-update.js
Update mathjax to 2.4.0

Source: https://github.com/mathjax/MathJax/archive/2.4.0.zip
Add ionic and ionicons

Source: https://github.com/driftyco/ionic/releases/*.zip

Fulfilling email request.
Update jPlayer to 2.6.3

Source: https://github.com/happyworm/jPlayer/releases