Merge pull request #1993 from rembo10/develop

Time for HP v0.5
Merge remote-tracking branch 'rembo10/develop'

* rembo10/develop:
  Fixed link to installation wiki
  Improved the CHANGELOG, part 3
  Improved the CHANGELOG, part 2
  Improved the CHANGELOG
  Fix for #1994
Merge branch 'develop'

* develop:
  Release v0.5.1
  Prepare for next release
  Fixed HTML div closing tag. Updated titles
  Fixed typo
  Allow one to disable all tasks
  Allow one to adjust interval settings without restarting.
  Prevent infinite recursion while scanning library.
  Fix for new paths
  Added the real pkg_resources from setuptools 7.0. Should fix #2001
  Fixed contrib scripts. Added *.pyc cleaning scripts
  Check if pyOpenSSL is installed before enabling HTTPS.
  Ignore CSR files
  Fixed SSL too long errors in CherryPy.
  Spaces removal
  Add downgrade functionality (contributed script)
  Use urlparse to parse transmission URL
  Fix for #1998
Log exact write check error to log (debug)
Merge branch 'master' into develop

* master:
  Log exact write check error to log (debug)
Release v0.5.2