Fix licensing in files and readme

README.rst

bob/pad/base/algorithm/Algorithm.py

bob/pad/base/script/spoof.py

bob/pad/base/test/dummy/algorithm.py

bob/pad/base/test/dummy/database.py

bob/pad/base/test/dummy/extractor.py

bob/pad/base/test/dummy/preprocessor.py

bob/pad/base/test/test_databases.py

bob/pad/base/test/test_spoof.py

bob/pad/base/tools/FileSelector.py

bob/pad/base/tools/algorithm.py

bob/pad/base/tools/command_line.py

bob/pad/base/tools/extractor.py

bob/pad/base/tools/preprocessor.py

bob/pad/base/tools/scoring.py

doc/implementation.rst

doc/index.rst

doc/installation.rst

setup.py