Convert all passoft programs to python 2/3 compatible. Add this milestone to merge requests related to python 3 conversion for tracking purposes.

Mark off as completed.

• batch2par
• lopt
• mseedpeek
• e2h
• h2e
• bline
• bbcal
• changeo
• ckMseed
• fixhdr
• logpeek
• neo
• qpeek
• rt2ms
• tkeqcut
• refscrub
• coverplot
• data2passcal
• calday
• julday
• pocus
• petm