PIC24 at 70MIPS

This branch is for the PIC24ep clocked to 70MIPS. Main branch will be
reset to 8Mhz
Code Cleanup

Did some code cleanup, implemented a buffer for limiting RS485
transmits events, filtering of ADC inputs.
cleaning up files that were included in past commits
Merge pull request #1 from empireryan/70MIPS_pic24

70MIPS operation, cleaned code being merged to master branch