Update Sec7i_FLEXRamp.txt

Added code for RHW-4 Type D1 Outside and Inside Ramps
Added code for RHW-6S Type D1 Inside Ramps
Added code for D1 Inside Ramps for L0 RHW-8S and 10S; unsorted
Added code for E1 Inside Ramps for 6S, 8S, 10S; unsorted
Added widener and elevator code