Revert "Decrease the RPC message timeout from 30 seconds to 10"

This reverts commit 1b259a8. If you
call a function from Flash that ends up opening an alert, the call
blocks until the user closes the alert, and the call eventually times
out. A 30 second timeout isn't much better, but is harder to trigger
accidentally, whereas it's not difficult to trigger a 10 second timeout
on accident.

See bug #24.

src/rpc.c

@@ -68,7 +68,7 @@
 
 // Define the maximum amount of time (in seconds) to wait for a message
 #ifndef RPC_MESSAGE_TIMEOUT
-#define RPC_MESSAGE_TIMEOUT 10
+#define RPC_MESSAGE_TIMEOUT 30
 #endif
 
 // Define the maximum amount of time (in seconds) to wait for plugin connection