Makes 'make check' to get all external dependences
Merge pull request #3 from igorbonadio/check

Makes 'make check' to get all external dependences
Corrects tab usage
Solves issue #2. pg_config is used iff the program is avaiable
Purposes correction for Issue #4. Corrects generation of library only (without executable)
Adds .git/.gitignore/.gitmodules to be put in a package