Merge pull request #2 from alu0100611724/master

Actualization of developing branch
There was created the next classes: CSV2Arff, CsvImportPluging, SecFrec, and WekaTest.
Widgets.jar remove it.
Cycles class added. CsvImportPlugin change to ArffImportPlugin. SeqFrec change to FrecSeqPatterns.
New tests add it.
Adding Sequent.java and importStructure.ucls.
Change Cycles class name to Cycle.
Changes in FrecSeqPatterns and WekaTest
Improving import classes
Rearranging packages and adding visualizer
Adding plugin implementation classes and PetriNets plugin.
Changing the classpath and creating a AnalizerFSPPlugin class
Merge pull request #3 from alu0100611724/developing

Merging the Developing branch into Master