readme for the .raw2 file cleaning for 22303401

This deployment had a lot of comm issues with the pH controller. Many times, the pH controller responded with 'NAK', and each time that happened several new lines 
were inserted with just \r, in addition to the 'NAK\r\n' line. I used 'remove_NAK_and_empty_lines.m', to remove all of these lines. The files that remain are:
- 22303401_original.raw2: this is the original, untouched .raw2 from the deployment
- 22303401_cleaned.raw2: this file is the output of the function, and has all of the empty lines and 'NAK' lines removed
- 22303401_removed.raw2: this file contains all of the lines that were removed from the original file, as a double check for the function
- 22303401.raw2: this is a copy of 22303401_cleaned.raw2. This was done because the post processing code opens this file.