adding image for usage and ran all images through imageOptim

Author: chrisdl

README.md

@@ -1,3 +1,12 @@
 # Sort
 
-Extension for nova.app that allows you to perform simple sorting on highlighted text.
+Extension for nova.app that allows you to perform simple sorting on highlighted text.
+
+# Usage
+
+Currently you can sort in 4 different ways:
+
+  - Sort multiple lines based on a regular 0-9a-z sort.
+  - Sort one or more lines internally. For example a line saying `cba` will say `abc`.
+  - Sort multiple lines based by length (the number of characters including whitespace).
+  - Sort multiple lines based on length but reversed.

Sort.novaextension/README.md

@@ -1,3 +1,12 @@
 # Sort
 
-Extension for nova.app that allows you to perform simple sorting on highlighted text.
+Extension for nova.app that allows you to perform simple sorting on highlighted text.
+
+# Usage
+
+Currently you can sort in 4 different ways:
+
+  - Sort multiple lines based on a regular 0-9a-z sort.
+  - Sort one or more lines internally. For example a line saying `cba` will say `abc`.
+  - Sort multiple lines based by length (the number of characters including whitespace).
+  - Sort multiple lines based on length but reversed.