CRM-13379 prevent double click on confirm button on main contribution page to prevent double payment or error
CRM-13379 fix prev commit - still include emailcommon.js in email form

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* CRM-13379: Delete mailing from Archived, next page is Find Mailings
  http://issues.civicrm.org/jira/browse/CRM-13379
CRM-13379 fix merge bug
Merge pull request #1645 from eileenmcnaughton/CRM-13379

CRM-13379 disable button on Contribution_Main form after click to prevent multiple submits