Custom PIC part, minor layout changes

Schematic:
- changed encoder connector to right angle type
- rewired trimmer for LCD contrast, it needs to vary voltage, not resistance
- add net class for power line, specifying 24thou width and 12thou keepout
- LCD trimmers are 10k, not 100k
- add decoupling cap to IC1
- rename bus lines to LR and LG instead of L1 and L2
Board:
- moved power components on a slightly better place
- aligned diodes and resistors
Add current limiting resistors for LEDs
Add EAGLE description