Devlog 02

Modified the structure of history.json to support nested files also. Before it, trail only saved commit data for root level files.

---

Before:

{  
    "commitId": "...",
    "commitDesc": "Added authentication", 
    "date": "...",
    "files": {
             "index.js": "af82bd73...",
             "app.js": "b17de09a..."  
    }
}

---

After:

{
     "commitId": "...", 
     "commitDesc": "Added authentication", 
     "date": "...", 
     "filesAndFolders": {   
                  "D:\\Projects\\my_project_1\\file1.txt": "af82bd73...",    
                  "D:\\Projects\\my_project_1\\src\\app.js": "b17de09a..."  
       }
}