Return both URLs after upload

Fixes #25

assets/templates/txt/index.txt.tmpl

@@ -12,5 +12,10 @@ the command line.
     # Shorten a URL
     curl -F'shorten=http://example.com/some/long/url' https://{{.Request.Host}}
 
-    # Shorten a URL with a token to delete it later
-    curl -F'shorten=http://example.com/some/long/url' -F'deleteToken=' https://{{.Request.Host}}
+    # The first line of the result will contain the shortened URL.
+    #
+    # In the other lines, you will find other information, including
+    # information on how to delete the shortened object.
+
+    # To upload a file and only extract the shortened URL (i.e. throw away the rest)
+    curl -F'file=@yourfile.png' https://{{.Request.Host}} | head -n 1

assets/templates/txt/newFileUploadPasteSuccess.txt.tmpl

@@ -1,5 +1,8 @@
-{{if .Request.PostForm.deleteToken -}}
-https://{{.Request.Host}}/{{.Paste.Key}}{{.FileExt}}?deleteToken={{.Paste.DeleteToken | urlquery}}
-{{else -}}
 https://{{.Request.Host}}/{{.Paste.Key}}{{.FileExt}}
-{{end -}}
+---
+
+# View metadata
+curl https://{{.Request.Host}}/{{.Paste.Key}}{{.FileExt}}/meta?deleteToken={{.Paste.DeleteToken | urlquery}}
+
+# Delete this object
+curl --request DELETE https://{{.Request.Host}}/{{.Paste.Key}}{{.FileExt}}?deleteToken={{.Paste.DeleteToken | urlquery}}

assets/templates/txt/newRedirectPasteSuccess.txt.tmpl

@@ -1,5 +1,8 @@
-{{if .Request.PostForm.deleteToken -}}
-https://{{.Request.Host}}/{{.Paste.Key}}?deleteToken={{.Paste.DeleteToken | urlquery}}
-{{else -}}
 https://{{.Request.Host}}/{{.Paste.Key}}
-{{end -}}
+---
+
+# View metadata
+curl https://{{.Request.Host}}/{{.Paste.Key}}/meta?deleteToken={{.Paste.DeleteToken | urlquery}}
+
+# Delete this object
+curl --request DELETE https://{{.Request.Host}}/{{.Paste.Key}}?deleteToken={{.Paste.DeleteToken | urlquery}}