WIP booking

* CalAuth.aspx: A view ... still unused

* style.css: css overflow-y auto, the container making it modal has no
  margin.

* GoogleController.cs: Fixes again the calendar usage,
uses Google API key and client credentials found in configuration file

* ApiClient.cs: Google API key and client credentials are now found in
  configuration file

* CalendarApi.cs: Let the controller build the credential string from
  thr profile object.

* OAuth2.cs: The OAuth2 Client only needs a client id and secret

* yavsc.js: Fixes some css flipping

* ValidateAjaxAttribute.cs: A FIXME

* Web.config: Google key, client id and secret come from application
  settings

* Web.csproj: a page in more

* YavscModel.csproj:
* PostInfoByUser.cs:
* PostInfoByTitle.cs:
* BlogEntryCollection.cs: refactoring

web/Scripts/yavsc.js

@@ -47,7 +47,7 @@ self.ajax = function (method,data,callback) {
 self.onScroll = function() {
 	var $notifications = $('#notifications');
 		if ($notifications.has('*').length>0) {
-		if ($(window).scrollTop()>100) { 
+		if ($(window).scrollTop()>0) { 
 			$notifications.addClass("dispmodal");
 		}
 		else {