-- Source code directory --

 * This is the main source directory.

 * Files:
   - i-pi: Runs the simulation.

 * Directories:
   - engine: Holds the modules containing the objects used during the 
      simulation.
   - interfaces: Holds the modules containing the socket interface code.
   - utils: Holds the modules containing utility functions.
   - inputs: Holds the modules that deals with reading the input and the 
      restart mechanism.