Issue 237 monitor dir rename

Summary of solution for this branch:
User flow:
1. Stop the application
2. Run Do manual changes in monitoring directories (any change)
3. Run the application with new flag: manual_file_change=true
4. Application should provide new content data file with the manual changes (without doing any indexing), and exit
5. Run application again with new flag: manual_file_change=false (default calue). Application will load the uchanged content data file and continue

Alogorithm for step 3:
  load content data with new flag: 'manual_file_change'
  During load the application will builld new map:
    file,size,mod --> [checksum, uniqu]
  If key found more then 1 time,then uniqu become false. This will indicate not to do anything with it during manual change

  monitoring new behavior:
    existing files in Application Tree - ignore
    new found files in OS system:
      If not exist in map - need to be indexed. skip (will be handled in step 5.
      If exist in map (copied or moved):
        if uniqu is true - take the original checksum and add to ContentData
        if uniqu is false - need to be indexed. skip. will be handled in step 5.
    unmarked files (non existing) - will have legacy behavior and be remove from content data
  Write new content data to file
  Exit the application