Attempted to nudge wait timing onto half-cycle boundaries, which expands the number of partial machine cycles the Z80 can post but pleasingly also regularises them. Switched the AllRAMProcessor to reporting half cycles by default and corrected all Z80 tests.

Processors/AllRAMProcessor.cpp

@@ -25,7 +25,7 @@ void AllRAMProcessor::get_data_at_address(uint16_t startAddress, size_t length,
 	memcpy(data, &memory_[startAddress], endAddress - startAddress);
 }
 
-uint32_t AllRAMProcessor::get_timestamp() {
+HalfCycles AllRAMProcessor::get_timestamp() {
 	return timestamp_;
 }