Fixes icons on systems that cannot load icons from system

 themes using the fromTheme method like OS X, Windows, and some Linux Distros.
  If there is no system theme, it tries to set the theme to one of the bundled
 themes if possible, but also adds the fallback method for loading icons
 without a theme to each icon if that doesn't work.   Added an icons directory
 to keep the theme icons and toolbar icons separate from the other data.
 Included two bundled custom themes, based on breeze and oxygen.  Also fixed
 the call to the "geographic" icon and the "edit indi profile" icon since they
 may have been referencing the wrong icons.

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