Refactor startupgenome_get.php to consume Startup Genome API using CURL.

As per Issue #23, it looks like the HTTP class that is being used in this file was not persisting the AUTH_CODE header. I've refactored the file to use CURL and it seems to be working well. 

Not sure if this is something we want to include in the project being that I have removed alot of the error checking that was in place BUT it does work. 

Figured I would post the pull request just to see if there was any interest. 

Thanks.