Added screenshots, edited readme.

Author: deoxyimran

README.md

@@ -1,4 +1,9 @@
 ## Keeper
+<p float="left">
+  <img src="/screenshots/screenshot1.png" width="45%"/>
+  <img src="/screenshots/screenshot2.png" width="45%" /> 
+</p>
+
 A fast :notebook_with_decorative_cover:notes application made entirely using Go and the awesome immediate mode gui lib ***gioui*** (check the lib here: [gioui](https://gioui.org))
 
 Check out the releases for available downloads.