Mustache precompiling with grunt-contrib-hogan

grunt-mustache is used only for concatination of templates. I have exchanged grunt-mustache with grunt-contrib-hogan which precompiles templates and also concatinates them into one file.

In this commit I modified
- gruntfile template
- _bower.json
- _package.json
- app/index.js to add hogan as vendor script
- view/index.js to include templateFramework variabe while templating so it's possible to output this.template.render which is hogan's way of rendering precompiled template
- all views to use this.template.render