Issue#15: Dataset of the chapter 13

This branch brings:
  - The only one dataset of the chapter 13.

See merge request !16

Issue#14: chapter 11, lattice design

This branch brings only one data set.

See merge request !15

Issue#13: add datasets of chapter 10, BIB

This branch brings:
  - All datasets of the chapter 10 in Pimentel Gomes 2009;
  - Chapter 10 is about Balanced Incomplete Block designs;
  - Two datasets are a type III BIB, one is a type I and the other is a type II;
  - The build status is: success;

See merge request !14

Issue#11: Datasets of the chapter 8

This branch brings
  - Datasets of the chapter 8. So, 5 data frames are included with the corresponding `data-raw/*.R` and `data/*.RData` files and documentation on the `R/legTools.R`;
  - @brunaw is included as a collaborator in the DESCRIPTION;

See merge request !13

 - Insert one empty line between \item;
 - Fill paragraph to avoid go over 72 digits.

 - Includes data() and str() in examples.
 - Uncomment save().
 - Add the correponding page in the book.

Issue#10

This merge closes the issue#10. This branch brings:

  - Add `data-raw/RData2txt.R` file to generate plain text datasets (`*.txt`) from the binaries `*.RData`. The `.gitignore` ignores these `data-raw/*.txt` files;
  - Add a first version of a `.hooks/pre-push` script to send `*.txt` files to the public folder at <http://www.leg.ufpr.br/~leg/legTools/datasets/>;
  - Fixes the references to Pimentel Gomes;
  - Add the last dataset of the chapter 7 from a 2^3 RBD experiment with coffee.


See merge request !11