Storing of source files for analysis

- Original input files for analysis are stored in the build results directory.
- TodosReportStatistics expects List<File> in constructor to simplify the code.
TODOs Results page

- The result page is able to show data hardcoded in the code.
- Jelly script updated to use the defined data model.
- Legacy Folders and Languages tabs removed.
- Fixes of indentation in jelly files.