Update content.json

* Added our first youtube embed to line 809
* Added our first vimeo embed to line 831
* Added two "teach" resources under line 896; modified names on the rest to reflect the correct authors
Update content.json

Within CodingScripting blob: 
* made grammatical edits on lines 1158-1170
* added youtube embed to line 1142
* fixed incorrect Javascript takeover URL on line 1201
* added two new resources to "teach" section
Merge pull request #949 from keyboardkat/patch-19

Fixes Bug 1058342 - Add more resources to Web Literacy: Remixing page
Merge pull request #950 from keyboardkat/patch-20

Bug 1046309 - Web Literacies Map: Add new teaching kits to "Coding/Scripting" page in JSON
1.1.50
 Bug 1040960 - Convert /getinvolved to angular + makerstrap
Merge pull request #947 from gesa/1040960/update-getinvolved

Fixes Bug 1040960 - Convert /getinvolved to angular + makerstrap
 Bug 1041001 - Convert /about to angular + makerstrap