Prevent loading of Stripe dependencies on all pages

[MendelYev]

stripe.js and checkout.js are loaded in all pages since they are imported in the header. Instead, you could use :

• the $.getScript() jQuery function in a Template.mytemplate.rendered block
• wait-on-lib package which allows to import your dependencies directly from iron-router

These are well explained there : http://www.meteorsnippets.com/blog/add-external-scripts-in-meteor

But this pull request will probably break the client tests...

[okpatil4u]

Are you going to update this one ?

[elie222]

+1, updating this?