Fixes for xBSD and simplified processing

- Getting properties using macro function
- Replacing properties using macro function
- Sanitize of filter.xml file (new requirement)
- Matching filters into separate lines (new requirement)
- Reading SED commands from stdin instead of passing them (BSD fix)
- Logic for adding new filters without include/exclude directives
  in case of matching tree on higher level (many low-level filters affected
  together)