Add install script
diff --git a/simpleepub.desktop b/simpleepub.desktop
new file mode 100644
index 0000000..a187247
--- /dev/null
+++ b/simpleepub.desktop
@@ -0,0 +1,4 @@
+[Desktop Entry]
+Type=Application
+Name=Simple EPUB
+Exec=/usr/local/share/simple-epub/epub.sh