do not attempt to load monitors that depend on psutils when the package
is not there
fix decorator factories tests to skip psutils dependent tests
skip cython tests when no cython monitor is available
skip memory monitor tests when psutil is not available
remove debuging line
forgot to change the line numbers
Update api.py
add copyright notice
update the line numbers
fix the line numbers again
update copyright notice
add copyright notice
update copyright notice
Merge remote-tracking branch 'origin/remove-hard-requirements' into remove-hard-requirements

* origin/remove-hard-requirements:
  update copyright notice
  update copyright notice
Merge pull request #50 from enthought/remove-hard-requirements

Remove hard requirements