adding reporter for parsing rendezvous logs

[strattonbrazil]

This adds a reporter that parses the logrendezvous output from telnet and builds a meaningful report. The report breaks down:

• most frequent rendezvous (and the average durations)
• longest single rendezvous duration
• adjacent rendezvous (by line) for opportunities to use queueFields

Example output:

=== Rendezvous by Frequency ===
18 - pkg:/components/some_brs_file.brs(27) (avg. duration: 0.001s)
14 - pkg:/components/some_other_brs_file.brs(178) (avg. duration: 0.023s)
...

=== Rendezvous by Longest Single Duration ===
0.369s - pkg:/components/some_brs_file.brs(24)
0.291s - pkg:/components/some_other_brs_file.brs(178)
...

=== Adjacent Rendezvous (opportunity to use `queueFields`?) ===
pkg:/components/some_brs_file.brs - lines adjacent to other rendezvous: 236-238, 251-258
pkg:/components/some_other_brs_file.brs - lines adjacent to other rendezvous: 45-47
...

To test:

• turn on rendezvous output by telnetting onto port 80 and running "logrendezvous on"
• start the roku script with "--report-rendezvous" flag
• observe outputted file