Look for 'number' input type; add new assets and build (zip) script.

Look for the 'number' input field type as editable. Add new icons and Web Store
promotional images, as well as a script to zip the required files. Remove
executable flag from non-executable files.

BUG=615448
R=ojan@chromium.org

Review URL: https://codereview.chromium.org//2222603002 .

Committed: https://chromium.googlesource.com/chromium/extensions-by-google/2bf8771f46b7696475853f16f068f940174f6aee
diff --git a/go-back-with-backspace/_locales/en/messages.json b/go-back-with-backspace/_locales/en/messages.json
index 6b07bd8..6fdb719 100644
--- a/go-back-with-backspace/_locales/en/messages.json
+++ b/go-back-with-backspace/_locales/en/messages.json
@@ -1,6 +1,6 @@
 {
   "extensionName": {
-    "message": "Go Back With Backspace (by Google)",
+    "message": "Go Back With Backspace",
     "description": "Name of this extension."
   },
   "extensionDescription": {
diff --git a/go-back-with-backspace/readme.txt b/go-back-with-backspace/readme.txt
index be0634d..9ed2d21 100644
--- a/go-back-with-backspace/readme.txt
+++ b/go-back-with-backspace/readme.txt
@@ -6,7 +6,7 @@
 pressing backspace and leaving a page -- so we removed the feature from Chrome,
 and created this extension for those who prefer the old behavior.
 
-This extension doesn't restore backspace on certain special pages, for example
+This extension can't restore backspace on certain special pages, for example
 any of the "chrome://" pages such as Settings or Extensions.
 
 About the "all sites" permission: In order to capture backspace on every page,