Base uri change after our discussion

Corrected resources ids and made it relative to base uri http://sct.snomed.info/
Removed property identifiers from uri and made them property agnostic. 
For example
Concept resource will look like http://sct.snomed.info/1234 
and module resource will look like http://sct.snomed.info/12345 

Basically now resource id in the form of http://sct.snomed.info/{sctdid}