updated Ethernet library with 18FxxJ60 and ENC424J600

[Jerry Messina]

I've updated the ethernet library download to include support for the 18FxxJ60 family with internal ethernet and also added support for the ENC424/624J600 10/100 chip.

some of the other features include:
- adds new files eth97J60.bas, ENCx24J600.bas, and modified ENC28J60.bas
- adds new file ENCSPI.bas which contains SPI routines for ENC28J60 and ENCx24J600 MACs
supports using MSSP1 or MSSP2 via '#option ENC_MSSP'
adds support for optional ENC_RST and polled ENC_INT IO pins (saves on SPI polling)
- modified Tick.bas module with support for selectable interrupt priority (#option NET_TICK_PRIORITY)
- new updated devices files for the J60 family (required)

Board Support example files (config, osc, and hdw setup routines):
- Olimex PIC-WEB board (18F67J60 internal)
- LJCV Electronics eIP-10 board (18F2620 with ENC28J60)
- Microchip Explorer18 board 18F8722 with PICTailPlus ENCx24J600 10/100
- Microchip Explorer18 board with 18F87K22 PIM and PICTailPlus ENCx24J600 10/100

[David Barker]

Thanks for that Jerry! The updates look really useful...

[RangerBob]

Good stuff Jerry! Will check it out when I get chance.