Fixes #5153: Moves RequireJS config to head
Refs #5151: CKEditor now loading as AMD module
Fixes #5151: CKEditor JS and CSS fully converted to 1.9 style.
Fixes #5154: Elgg AMD module only resolves once translations have loaded
Converts inline pages script to RequireJS
Converts developers plugin to AMD
Always initialize the elgg AMD module
Fixes #5179: Routing through /cache/0 when simplecache is off
Adds missing developers file.