Venn Compute 1.1.1

Verify output directory. If not existed, is created.
Vignettes change example in order to publish in CRAN. Example is working but for some reason validation create a warning but is not clear (image not found but image is located correctly in generated html).

Venn Compute 1.1.0

Venn Compute 1.1.0

First public release of venn.compute. This package is intended to compute
specific elements in intersections of Venn diagram instead of plot.

• Custom reader of files to create list of character arrays (such requiered for
  this package and VennDiagram).
• Compute specific elements in intersections of Venn diagram in memory or write
  to files.
• Plot with VennDiagram.