Change ads provider, and add consent system for advertising (#155)

* Add GAM integration & base for GPDR consent

* Moved consent to a specific page.

* Added functionality to the privacy page, and desactivate tracking if consent is not given.

* Added GeoEdge support, and fixed auth issues

* Fix actions issue

* Fix actions issue, attempt 2

* Added a module for analytics with consent support.

* Remove unnecessary function

* Add support for runtime config

modules/gpt-ads/lib/constants.js

@@ -0,0 +1,16 @@
+export const DEFAULT_OPTIONS = {
+  networkCode: null,
+  debug: false,
+  ghostMode: false,
+  componentName: 'GptAd',
+  individualRefresh: false,
+  responsive: false,
+  collapseEmptyDivs: false,
+  emptyClass: 'is-empty',
+  geoEdgeId: ''
+};
+
+export const GPT_LIB_SCRIPT_ID = 'google-publisher-tag-lib-script';
+export const GPT_INIT_SCRIPT_ID = 'google-publisher-tag-init-script';
+export const GEOEDGE_CONF_SCRIPT_ID = 'geoedge-config-script';
+export const GEOEDGE_LIB_SCRIPT_ID = 'geoedge-lib-script';