Merge pull request #65 from pradpnayak/MTE-39

Mte 39
--MTE-40, fixed code to alter ENUM for CiviCRM version prior to 4.5
-- MTE-40, Added upgrade code to handle #2 in https://jmaltd.atlassian.net/browse/MTE-40
Merge pull request #66 from pradpnayak/MTE-40

--MTE-40, fixed code to alter ENUM for CiviCRM version prior to 4.5
MTE-39, Update DAO file