Converts Time::get into a template, introduces a via-a-double fallback for the timed event loop.

Storage/Disk/Controller/DiskController.cpp

@@ -66,7 +66,7 @@ void Controller::set_expected_bit_length(Time bit_length) {
 
 	// this conversion doesn't need to be exact because there's a lot of variation to be taken
 	// account of in rotation speed, air turbulence, etc, so a direct conversion will do
-	int clocks_per_bit = static_cast<int>(cycles_per_bit.get_unsigned_int());
+	int clocks_per_bit = cycles_per_bit.get<int>();
 	pll_.reset(new DigitalPhaseLockedLoop(clocks_per_bit, 3));
 	pll_->set_delegate(this);
 }