Changes in 0.1.4 version:
* Added ASAP (As Soon As Possible) anad ALAP (As Late As Possible) charts.
* The vignette supplemented adequately to the changes introduced.

Changes in 0.1.3 version:
* Added the optional fixed_seed parameter to the functions that plot graphs.
* Added directive term for normal time to the list containing results for the LESS method.
* Fixed some minor bugs in the code.
