[#35,view][s]: notifications for loading of data (and success thereof) both on initialization and on new queries.
[#35,view][s]: notifications for loading of data (and success thereof) both on initialization and on new queries.

* refactor notify to fadeOut notifications (for persist=false)
* refactor DataExplorer to have a common query method
* new clearNotifications method

okfn/recline,gotjoshua/recline,beni55/recline,rjsteinert/recline,acouch/recline,acouch/recline,boban-dj/recline,GerHobbelt/recline,GerHobbelt/recline,boban-dj/recline,modulexcite/recline,NuCivic/recline.js,maxogden/recline,huangciyin/reclinejs-requirejs,modulexcite/recline,okfn/recline,huangciyin/reclinejs-requirejs,boban-dj/recline,beni55/recline,acouch/recline,gotjoshua/recline,maxogden/recline,NuCivic/recline.js,NuCivic/recline.js,modulexcite/recline,okfn/recline,rjsteinert/recline,gotjoshua/recline,rjsteinert/recline,GerHobbelt/recline,beni55/recline