Changed fiels and folders structure

- Changed files and folders structure
- Use singular names convention for files, folders and modules

There was change files and folders structure becouse it is more flexibility. For example when scrooge become not a single page application then current files/folders structure is ready for that.
Second reason is more visibility for new programmers. When frontend will grow rank then is easier controll everything.

The results of considering about using singular or plural names is using singular names. There is no any special reason, just calculate plus and minus.
please check this block code for correctness - especially order in of arguments ``$watch`` function