Travis-CI integration

I integrate db2-hash-routines with Travis-CI a Continuous Integration tool that exist for GitHub projects.
I used db2unit in order to test the functions. I created the tests based on the documentation as you can see in the tests.sql file.

The .travil.yml file contains the integration with Travis-CI, it install DB2, the dependencies and it follows the installation process. However, there are some tests failing.

 * TEST_APR_CRYPT and TEST_APR_MD5 always generate a different string. I do not know how to test them.
 * TEST_BCRYPT cannot be executed because there is a problem with the hash file. Can you check the output?

The jobs that tests this tool are at: https://travis-ci.org/angoca/db2-hash-routines
Once you integrate this pull request into your trunk, and enable travis-ci, the process will be automatic for you.

I create 3 files, and modify the register.ddl in order to not generate error.