Version 2 of NIM_LTB:
-Merged voltage divider circuits that provide reference voltage to comparator.
- Removed input terminating resistors.
-Edited resistor values on CMOS->NIM circuit to reduce current train and better conform to NIM spec.
-Replaced a few resistors that need to dissapate a relatively large amount of power with 0603 package
-Added power stabilizing cap to comparator.

Also added SIMetrix simulation files for part of NIM_LTB.