Fixed typo

Issue #2269967 by Mark Carver: Js_callback_process_request() converts unnecessary parameters using via drupal_json_decode().

Issue #2271279 by Mark Carver: Content request using GET doesn't return the top level render array element.

Issue #2269967 by Mark Carver: Js_callback_process_request() converts unnecessary parameters using via drupal_json_decode() .

js.js - Drupal.checkPlained values in JS.snakeCaseObject
js.js - Determine the correct value in JS.processFormValues()

Allowed GET requests to pass query parameters to invoke a callback (this is needed for modules that don't require the JS module, but want to provide support: admin_menu).

- removed code that caused the js callback to load all modules

Added initial js_example module.

Refactored module.

Added extended callback logic and reverted template based per-site configuration back to a per-module/hook based version.

Added implementations and permissions for auto-generating js.php. Added .htaccess warning on module disable.

Added a generic file generation function (to be called by both download and autogeneration). Added js.php auto generation routine. Added .htaccess suggestion (in addition to the additional lines info). Fixed several Drupal CS issues (typos, comments). Fixed typo.