CRM-13900 - Fix back to report URL.

----------------------------------------
* CRM-13900: Back to Report listing in Mailing Event reports has the wrong URL
  http://issues.civicrm.org/jira/browse/CRM-13900
CRM-13905 - Strict warning php 5.4.19

http://issues.civicrm.org/jira/browse/CRM-13905
Merge pull request #2154 from dlobo/CRM-13905

CRM-13905 - Strict warning php 5.4.19
CRM-13906 - Notices and Warnings in Contribute Repeat report

http://issues.civicrm.org/jira/browse/CRM-13906
Merge pull request #2155 from dlobo/CRM-13906

CRM-13906 - Notices and Warnings in Contribute Repeat report
Merge pull request #2146 from davecivicrm/CRM-13900

CRM-13900 - Fix back to report URL.