Move classes to namespaces

[guneyozsan]

• Particularly prevents naming conflict between namespace "Editor" for "/Assets/Editor/" and "class ReporterEditor : Editor".
• Namespaces are used to prevent any future conflicts instead of changing "class ReporterEditor : Editor" to "class ReporterEditor : UnityEditor.Editor".
• References the folder name "Unity_Logs_Viewer" from plugin unitpackage in asset store.