Improved processing of filters

- Package changes (delta) calculation completely rewritten
- Delta is now displayed on stdout with status per filter
- Reused filter sanitization and grouping for displaying original filters
- Now -r option accepts correctly wildcard filters i.e. -r /content/app
  will now match /content/app, /content/app1, /content/app2, ... filters
- sed instructions are not collected from delta output (not from variables)
- Instead of adding new filters (which there is no point to do that)
  some filters are matched as not changable by '=' status to save
  include/exclude settings
- filters that aren't touched (marked by '=') are additionally extracted
  from original package (additionally to arguments passed by user using -r)