wip: displays instagram thumbnails

- split success into some/no results
- passthrough instagram data
- ng-repeat for instagram images
- css adjust image size to match thumbnails
fix results count
update presentation of instagram images

- add `.gallery` class
- trim whitespace around images
- switch to low resolution image
- display 4 items per row
hide search header until query is run
fix test for no results
display error for no results

- add `.status` styles
- track whether searching was found results
- display indeterminate progress bar while searching
add API error message

test this by putting a space in the query field