README.md in smtpapi-0.0.3 vs README.md in smtpapi-0.0.4

@@ -24,28 +24,28 @@
 
 ```ruby
 header = Smtpapi::Header.new
 ```
 
-### json_string
+### to_json
 
-This gives you back the stringified json formatted X-SMTPAPI header. 
+This gives you back the stringified json formatted X-SMTPAPI header.
 
 ```ruby
 header = Smtpapi::Header.new
-header.json_string
+header.to_json
 ```
 
 ### add_to
 
 ```ruby
 header    = Smtpapi::Header.new
 header.add_to('[e-mail]')
 header.add_to('[e-mail]')
 ```
 
-### set_to
+### set_tos
 
 ```ruby
 header    = Smtpapi::Header.new
 header.set_tos(['[e-mail]', '[e-mail]'])
 ```
@@ -120,18 +120,36 @@
 
 ### set_filters
 
 ```ruby
 header    = Smtpapi::Header.new
-filter = { 
-  'footer' => { 
-    'setting' => { 
+filter = {
+  'footer' => {
+    'setting' => {
       'enable' => 1,
       "text/plain" => 'You can haz footers!'
     }
   }
-} 
+}
 header.set_filters(filter)
+```
+
+### set_send_all
+
+```ruby
+header    = Smtpapi::Header.new
+lt = Time.local(2014, 8, 29, 17, 56, 35)
+header.set_send_all(lt)
+```
+
+### set_send_each_at
+
+```ruby
+header    = Smtpapi::Header.new
+lt1       = Time.local(2014,  8, 29, 17, 56, 35)
+lt2       = Time.local(2013, 12, 31,  0,  0,  0)
+lt3       = Time.local(2015,  9,  1,  4,  5,  6)
+header.set_send_each_at([lt1, lt2, lt3])
 ```
 
 ## Contributing
 
 1. Fork it ( http://github.com/sendgridjp/smtpapi-ruby/fork )