updated pictures and demo.ejs
Shellington-Lite added for development

- Lite shellington version over tcp added for development
  * Connect via telnet
  * Allows focus command processing development
- OOP paradigm added
  * Each language has its own shell, inheritting form base shell
  * Different shell process input differently depending on
    language to detect multiline commands
  * Seperates child handling from server logic
- New "Shell" now initialized for each client
  * Each shell spawns its own child process so each client is
    given its own child process
  * Delimeter removed
- Enhances to python and R processing
  * Can now enter multiline commands: for loops, functions, etc.

TODO
- Incorporate Bash and Ruby into new changes
- Combine back-end changes into view