CRM-13421, fixed lineitem array for mail template for event

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* CRM-13421: Off-line Contribution Receipt Line-Items Garbled
  http://issues.civicrm.org/jira/browse/CRM-13421
Merge pull request #1686 from pradpnayak/CRM-13421

CRM-13421, fixed lineitem array for mail template for event
--CRM-13446, fixed Upgrade code for fatal error if civicrm_financial_account.contact_id is NOT NULL by default.

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* CRM-13446: Add ON DELETE Options for constraints fails
  http://issues.civicrm.org/jira/browse/CRM-13446
-- CRM-13340, this PR should be merged in 4.3, but merged in master so sending it again for 4.3 branch.

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* CRM-13340: upgrading to (unreleased) 4.3.6 gets sql error on some sites
  http://issues.civicrm.org/jira/browse/CRM-13340
Merge pull request #1694 from pradpnayak/CRM-13340

-- CRM-13340, this PR should be merged in 4.3, but merged in master so s...
Merge pull request #1693 from pradpnayak/CRM-13446

--CRM-13446, fixed Upgrade code for fatal error if civicrm_financial_acc...
Update version to 4.3.7