changed api call to search by txid

Bitcoin's api call "getrawtransaction" is called "gettransaction" in
Peercoin.

In bc_daemon.php:
*changed method name from "getwartransaction" to "gettransaction"
*removed $verbose parameter

In bc_layout.php:

*changed the data shown in the transaction report to reflect differences in
returned JSON data between Peercoin's "gettransaction" and Bitcoin's
"getrawtransaction." In particular "vin" and "vout" are no longer shown
when you search via txid.

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