Directories structure guidelines should be added

[Minh Nguyen]

Guidelines for directories structure is necessary for source codes organisation.
These guidelines will regulate the ways people's works are placed and organised for tracking and improving.

Proposed structure:

• / or root directory: this is the first place everyone see in the repository, this should be the place for general-purpose
  files like README.md, CONTRIBUTING.md, or other configuration and guidelines files
• /source or /src: this is where source files (*.html, *.css, *.js, etc.) are placed, these files can be built into executables. There maybe directories of other files used by the program or media files for the HTML pages also put inside here, such as:
  • media: for media files: images, videos, audio, etc.
  • header: for programming headers
  • data: for storing data
• /pages: equivalent to source, should be either of 'em exists.
• /Documentation: for documentations such as flowcharts, changelogs, etc.
• Designated directories produced by IDEs/Editors: if it's totally dependent on using these tools, these kinds of directories should be pushed to the repository, ideally place 'em in root directory.