Tidy-up <Key> and <Body> tags
Various fixes to Online Submission

* Default Regulator Name setting to 'CCEW' for Charity Commision of
England and Wales;
* Default Regulator No to 'A1234' as an example;
* Now will pickup the Regulator values from the Settings table;
* The HMRCref setting is now set to be the same as CHARID;
* The GatewayTimestamp is now defaulted to the current time;
Merge pull request #14 from longveda/Add-Config-Parameter-'Contribution-Details-Source'

Changes to fix Online Submission