Run line-by-line and handle a nil object exception

[jlfranklin]

The first commit changes the way the program processes the 1pif file to go line by line instead of pulling it all in at once. It means:

• the UUID lines between JSON objects can be easily ignored, and if they are not present the file still processes
• the process requires less memory
• it was easier to debug
• if a JSON object takes more than one line, this script will break. (did not happen with my input file of about 1000 records.)

The second commit adds the exception begin/rescue/end handing to add an empty object when no password or username fields are found.

[tobiasvl]

Thanks!

[tobiasvl]

@jlfranklin Feel free to send the patch to the pass mailing list too to get it upstream! Otherwise I can do it.