Merge pull request #10 from guanhuan/4.7.19

Add 4.7.19 schedule

README.md

@@ -7,6 +7,7 @@ index of release-plans and the release invitations.
 
 | Name            | Invitations     | Review Week    | Test Week      | Release       | Post Mortem | Planning Document |
 | --------------- | --------------- | -------------- |----------------| ------------- | ----------- |-------------------|
+|April-May Cycle (4.7.19)| Apr 7 - 13 | Apr 13 - 18| Apr 19 - 2 May | May 3, 2017 | N/A | [Signup Form](https://civicrm.org/civicrm-release-sign-up) [Release Management](https://civicrm.org/civicrm-release-management)
 |March-April Cycle (4.7.18)| Mar 13 - 19 | Mar 19 - 22| Mar 23 - 4 Apr | Apr 5, 2017 | N/A | [Signup Form](https://civicrm.org/civicrm-release-sign-up) [Release Management](https://civicrm.org/civicrm-release-management)
 |February-March Cycle (4.7.17)| Feb 9 - 16 | Feb 17 - 23| Feb 24 - 5 Mar | Mar 6, 2017 | N/A | [Signup Form](https://civicrm.org/civicrm-release-sign-up) [Release Management](https://civicrm.org/civicrm-release-management)
 |January-February Cycle (4.7.16)| Jan 9 - 16 | Jan 17 - 23|Jan 24 - 7 Feb | Feb 8, 2017 | N/A | [Signup Form](https://civicrm.org/civicrm-release-sign-up) [Release Management](https://civicrm.org/civicrm-release-management)