Described indira_log_stdout_h:init/1 a little better.
Added I/O server module.

It's intended to send printed data to error_logger.
Actually, I/O server should not die on error.
Changed variable name in indira:start_rec/2.
Added support for printing logs to STDOUT, STDERR or group leader.
Renamed module indira_log_stdout_h to indira_log_tty_h.
Extended Indira's logging API a little.
Implemented (most of) logging setup.
Actually, loading plugins should not be Indira's duty.

This would be the only point to include Indira as a dependency. Loading
plugins could easily be put in a separate application.
Removed outdated comment from parser code.
Updated -spec and documentation for indira:setup_logging().
Filled indira:load_app_config/1.
Added sending "bad result" to client on commander bad reply.
Changed a little simple command definition in protocol parser.
Improved documentation (described configuration and protocol).
Added TODO entry.
Added proposals for supported commands. Added few TODO entries.
Generated documentation shouldn't include private functions.
Added README file.