Measure and log Pystone performance, and - if possible - CPU type

Pystone performance will give an indication of the performance that can be expected from SAB, par2 and unrar
Scheduling logging in proper format (hh:mm), so 08:05 instead of 8:5

Old:
2014-10-26 08:03:11,305::DEBUG::[scheduler:127] scheduling speedlimit(['5000']) on days [1, 2, 3, 4, 5, 6, 7] at 8:5

New:
2014-10-26 08:18:45,493::DEBUG::[scheduler:127] scheduling speedlimit(['5000']) on days [1, 2, 3, 4, 5, 6, 7] at 08:05
Update unrar for OSX to 5.11

(Earlier update wasn't right for OSX.)
Fix problem of testing email server with existing parameters.

In existing email parameters the password consists only of asterisks.
In that case, get the password from storage.
Also improve the logging of failed authentication attempts.
OSX Yosemite: make top-menu icon compatible with "Dark Mode".
Added an issue and made some language corrections.
Update copyright year.
Let the API-call "Retry" return the new nzo_id of the job.

Also change the status of a doomed re-fetch from "Failed" to "Fetching".
Support for the NZB meta field "x-rating-host".
Update text files for 0.7.20RC1
Merge pull request #184 from sanderjo/0.7.x

Measure and log Pystone performance, and - if possible - CPU type
Update unrar to 5.11 for (Snow)Leopard on Intel, but not for PPC.

There's no unrar 5.* release for PPC.
More flexibility in Rating meta data.
Update text files for 0.7.20RC2
Update some license files.
Make sure that Rating support is suppressed completely when disabled.
Update text files for 0.7.20
Merge tag '0.7.20' into 0.7.x-ServerRR

* tag '0.7.20':
  Update text files for 0.7.20
  Make sure that Rating support is suppressed completely when disabled.
  Update some license files.
  Update text files for 0.7.20RC2
  More flexibility in Rating meta data.
  Update unrar to 5.11 for (Snow)Leopard on Intel, but not for PPC.
  Update text files for 0.7.20RC1
  Support for the NZB meta field "x-rating-host".
  Let the API-call "Retry" return the new nzo_id of the job.
  Update copyright year.
  Added an issue and made some language corrections.
  OSX Yosemite: make top-menu icon compatible with "Dark Mode".
  Fix problem of testing email server with existing parameters.
  Update unrar for OSX to 5.11
  Scheduling logging in proper format (hh:mm), so 08:05 instead of 8:5
  Measure and log Pystone performance, and - if possible - CPU type