Add backward compatibilty for Contact and Location api's

Due to some major code clean up in 3.0, input format for following api's have changed. So we need to maintain backward compatibility for these api's.

1. api/v2/Contact.php
civicrm_contact_create( );
civicrm_contact_update( );
civicrm_contact_format_create( );

2. api/v2/Location.php
civicrm_location_add( );
civicrm_location_update( );
civicrm_location_get( );

• If input params contain 'version' = 3.0 then we should assume api's are formatted according to new format.
• If version is missing we should reformat according to old format.

Basically implement a wrapper function to format location related params based on version.