Update free-programming-books-pt_PT.md
Update Real World OCaml link, add few books
Merge pull request #360 from BlueKore/patch-1

Added some books and more magazines.
Merge pull request #359 from JIghtuse/master

Update Real World OCaml link, add few books
Merge pull request #361 from esparta/master

[es] new spanish books about CS, Java, Algorithms & data structures
Added graph theory book
Adicionando a apostila da caelum sobre ruby com rails
Merge pull request #362 from mosampaio/patch-1

Adicionando a apostila da caelum sobre ruby com rails
corrected index
Merge pull request #363 from Leandros/patch-1

corrected index
Merge pull request #364 from tia510/master

Added graph theory book
[es] New java book