* Increase default image size a few settings
* Increase gutter between items
* Remove extraneous padding and whitepsace
* Remove unneeded gigantic heading
* Move build version into statusbar
* Change algorithm for fitting rows -- instead of preferring to clip
edges of image, instead prefer to adjust height of rows. I find it
looks more interesting visually when the widths of the images vary
more.
* Replace folder and file icon with something better looking
* Swap order of + and - buttons in toolbar, they were backward from
what is typical
Change-Id: Idfe85a813926c2c9eea774a86046df62ecacd45c