update sql2o version number
Merge branch 'master' of http://github.com/CruGlobal/conf-registration-api
Merge pull request #206 from CruGlobal/update-sql2o

Update sql2o
re-added create_crs_db_and_roles.sh/.bat
Merge pull request #208 from CruGlobal/brian-databaseScript

Provide  create_crs_db_and_roles scripts
Add trust commerce dependency.
Add trust commerce request,response fields and values.
Add TrustCommercePaymentProcess to processCreditCardTransaction(...)
Add TrustCommerceException.
Add TrustCommercePaymentProcessTest
Simplify exception handling.
Refactor to more readable enumerated type names
Get non null trust commerce properties
Add PaymentProcess interface and implement in Payment processes.
Refactor conference costs payment gateway credential field names
In preparation for introducing another payment gateway type
Establish PaymentGatewayType
Refactor (in the code) authnetTransactionId to simply transactionId
Change authnet_transaction_id to transaction_id at the database layer.
Add PaymentGateway to Conference and ConferenceCostsEntity
Refactor TrustCommerce processCreditCardTransaction