AIDE Intrusion Detection Tool 0.16.1 Release

- Move to GitHub
- Update documentation
- Bug fixes

* BACKWARDS INCOMPATIBLE CHANGES:
    - Negative selection lines of the form '!<regex> <groups>' are no
      longer supported (use '!<regex>' instead)
    - The switch to Perl 5 Compatible Regular Expressions and the fix of
      '.*'-rule matching may result in different rule matching behaviour
* Support restricted selection lines
* Switch to PCRE library (drops bundled GNU regexp library)
* New config options:
    - database_add_metadata
    - database_attrs
    - report_base16
    - report_detailed_init
    - report_force_attrs (deprecates report_attributes)
    - report_ignore_added_attrs
    - report_ignore_removed_attrs
    - report_ignore_changed_attrs (deprecates ignore_list)
    - report_ignore_e2fsattrs
    - report_quiet
    - root_prefix
* New '--limit' parameter
* Report changes:
    - enable summarize_changes by default
    - use '|' to separate the old value from the new one
    - wrap attribute values instead of cut them off
    - side-by-side output of acl and xattrs values
    - adjust file type letters in summarize_changes output
    - add numeric timezone to time string
    - add info about verbose level to report if it differs from standard
      value
    - add info about number of entries if aide found no changes or
      the database has been initialized
    - add run time to report
    - print "End timestamp" message in report
    - print human-readable info about ignored and forced attributes in report
    - print checksums of databases in verbose level 2 or higher
    - print added and removed attribute values of changed entries in
      verbose level 6 or higher
    - print details about added and removed entries in verbose level 7
      or higher
    - print added or removed attributes of changed entries if forced via
      report_force_attrs
* New default group: X
* Fix '.*'-rule matching
* Handle tilde (~) in database paths and report urls
* Sort entries of database file
* Compare database entries just once
* Add warning if a group is redefined
* Update documentation
* Bug fixes
* Code clean up

* Added new grouped option
* Sort files in report by filename
* Added support for e2fsattrs attribute
* Added support for ftype attribute
* Bug fixes

* Report correct file type in "Detailed information
  about changes" section
* Bug fixes

* Added aide-attributes.sh contrib script
* Bug fixes