Log management

[jeissonh]

Apply scientific papers recommendations to logs:

• [x] Refactor logging system: #120
• [ ] Select the events to be logged
• [ ] Submit copies of the log to a central server (eg jeisson.ecci.ucr.ac.cr)
• [x] Uniform the separator. Sometimes semicolons (;) are used, other tabs (\t) are used
• [x] Replace the field separator in source code snippets (eg: \t by @t) in the same way that new lines were replaced by @n
• [ ] Add column Level or Scene that indicates the scene (menu, levels) or the name of the level (1-1 sum_xy, 6-3 median)