[Enhancement #72 - Add spinning gif "loading" when searching] - creating spinner css and adding it to the search template

To make this possible I had to add the "isSearching" property in the "search" scope. After I created the scss for the spinner, and then finally added the "markup spinner" in search.html with ng-show = "isSearching". 
 I am available to correct possible errors or adjustments needed.
![spinnerexample](https://cloud.githubusercontent.com/assets/2081077/3716985/0f5f753a-161d-11e4-837d-f9eff4c05cfc.png)