[Chapter 4] Moving some data (title and strapline) from view to
controller
[Chapter 4] Moving data from view to controller in the location-list
page
[Chapter 4] Creating a mixin for the star rating
[Chapter 4] Moving data from view to controller (about page)
[Chapter 4] Moving dta from view to controller (location-info page)
[Chapter 4] Moving data from view to controller (location review page)
[Chapter 4] Minor change on the Sign-in Page label