Fix for cases of input/output from sloped conveyors not working.

Fix split mode output incorrecly looking for a sloped conveyor and offloading to conveyor/pipe entities 1m below the output side.

- Remove undocumented secondary output of items underneath the splitter.

- Add error catch on data read to prevent issues with clients connecting to servers that do no have the latest version of this mod.

- Added new option to turn off the secondary input delay when the machine is in Primary/Secondary Merge mode. When turned off the maximum throughput speed is possible, but a hopper (or other storage machine interface device) must be used on both inputs in order for the mode to function properly. Indicators will turn red if an unsupported device is used in this mode and setting combination. This combination cannot with with conveyor/pipe entities because they work by pushing to the target machine making it impossible for this machine to control or determine the input order to ensure the primary input is first.
- Vastly improved handbook entry that properly describes all operating modes.

- Fix for input not working with up sloped conveyors.
- Fix for output not working with up sloped conveyors when mounted on the side or upside down.

Distribution Splitter will now extract from Mass Storage Outputs Ports.

Distribution Splitter will now properly extract from an Advanced Logistics Hopper.

Reduced research point cost to balance with changes to FCE.

Remove old debug performance code.