2011-11-23 Pedro Canadilla <pedro.canadilla@gmail.com>
    * Removed the floor conditions to check that the number of servers c has to be an integer number. Used is.wholenumber
as recommended in the doc.
    * Added the comprobation of the c valueto be integer in the M/M/c, M/M/c/K/M, M/M/c/K/K, M/M/c/K, M/M/c/c models.
    * Added the CheckInput to every node in an Open JackSon Network.
    * Implemented the Bard-Schweitzer aprroximation algorithm in the Closed Jackson Network.


2011-11-22 Pedro Canadilla <pedro.canadilla@gmail.com>
    * The WWq value of the M/M/1 model has been fixed to the correct value (W). Thanks to Juan Antonio Fernandez
(jafernandez at fi.upm.es) fo detect it. 

2011-11-02 Pedro Canadilla <pedro.canadilla@gmail.com>
    * The B_erlang function has been modified to be faster. High order functional functions like Reduce has been tried but finally a simplified -for- winned the system.time simple benchmark.
    

2011-10-30 Pedro Canadilla <pedro.canadilla@gmail.com>
    * The RO funtion in the M/M/Infinite model has been established to the L value, because that has been seen in more than one literature.
    * In consecuence, the Open Jackson Network inherits this change and also the Closed Jackson Network has been updated.
    
2011-10-18 Pedro Canadilla <pedro.canadilla@gmail.com>
    * Fixed the summary function of the Open Jakson Network, Closed Jakson Network, Multi Class Open Network and
Multi Class Closed Network. The print function has been replaced by the cat function.
    * Fixed the bug with the RO and W values of the Multi Class Closed Network.
    * The Multi Class Closed Network QueueingModel returns a vector Throughputcn with the Throughput of each class and of
each n population passed as Input parameter. The reason is performance to compute multi class load dependent models.
    
2011-09-24 Pedro Canadilla <pedro.canadilla@gmail.com>

    * The Closed Jackson Network QueueingModel returns a vector Throughputn with the Throughput of each n population
passed as Input parameter. The reason is performance to compute load dependent models.  

2011-09-23 Pedro Canadilla <pedro.canadilla@gmail.com>

    * Introduced the Closed Multi Classes model.
    * Nomenclature more consistent. Wi, Li, Throughputi has been substituted by Wk, Lk, Throughputk respectively.
    * Several minor errors in the documentation has been fixed.
    * Included a parameter operational in the closed jackson network model to be able to use visit ratio with a stacionary
probability meaning or with an operational point of view.

2011-08-20 Pedro Canadilla <pedro.canadilla@gmail.com>

    * Fixed values for M/M/c/K/K and M/M/c/K/m models in case of RO = 1.
    * logFact function used has been sustituted by built-in function lfactorial, more precise with small values of n.
    * CheckInput for multiple Class Open Network has been revisited to detect saturated nodes.
    * The variable classes has been introduced to NewInput.MCON model input. The reason is performance.


2011-08-12 Pedro Canadilla <pedro.canadilla@gmail.com>

    * Fixed B-erlang and C-erlang functions to have defaults values and to check values.

    * Fixed extreme value of Pn in M/M/1/K/K model.

    * More detailed documentation has been created for the saturation point in the M/M/1/K/K model. The optimal number of 
clients (or saturation) point coincides with the inverse of the serialization parameter of Amdalh's Law. That is, the value 
which converges the speedup function k/(1 + ser(k-1)). It makes sense, because the saturation point is the maximun value in 
which no syncronization happens.

    * Fixed in the M/M/1/K/K model the Pn function. It was returning RO instead of Pn.

    * Fixed and improved the model M/M/c. The parameter n was not working as needed.

    * Included a new parameter method which controls if the probabilities are calculated exactly or if an aproximation is 
used in models M/M/1/K/K, M/M/C/K/K, M/M/C/K/M, M/M/C. The aprox method are useful to get the model work with higher 
parameter values.

    * Fixed also the parameter n in models M/M/1, M/M/C and M/M/Inf. With n=-1, no probabilities are calculated. 

    * Documented the resolution of a Open Jackson Network with visit ratios instead of probabilities.

    * Added the node of type M/M/Inf (or delay node in the literature) in the Open Jackson Network.

    * Added the model M/M/Inf/K/K.

    * Added more examples in the documentation of Open Jackson Models and Closed Jackson Model to use visit ratios.

    * Fixed a bug in Closed Jackson Network with several nodes of class M/M/C

    * Added the Multi Class Open Network model.

    * Fixed some doc, W in the Open Jackson Network.

    * Top level Copying file deleted.

    * removed is.nan(x) just because of CRAN checks. 

