Change some provider images. Add a few new images.

Add nzbs_in and nzb_is for custom providers to use.
Add network images for Esquire and Smithsonian.
Add a tweaked 6box for dark and light themes.
Reduce size of some images.

CHANGES.md

@@ -5,6 +5,7 @@
 * Fix purging of database files in tear down function during unit tests
 * Add ability to auto focus Search Show box on Home page and control this option via General Config/Interface
 * Add TVRage network name standardization
+* Change some provider images. Add a few new images
 
 [develop changelog]