Merge pull request #132 from diskoverdata/2.3.4

2.3.4 updates
improved scanning and indexing performance, new indexthreads cli option and config setting to control indexing threads

Merge pull request #130 from alexingfds/DEV-519-remove-timezone-info-…

…00-00-from-indexed-file-directory-times

Remove timezone info from indexed file and directory

Merge pull request #125 from diskoverdata/2.3.1

Update diskover.py mem leak fix

Merge pull request #123 from diskoverdata/2.3.1

Update diskover.py fixed datimetime utc deprecation warnings in pytho…

Merge pull request #116 from sublimal/bugfixes

plugins_files and plugins_dirs no longer defined

updates

Merge branch '2.2.1'

updated changelogs

Update nav.php

Merge branch '2.1.0'