Fix some typos

[JosemyDuarte]

ECHO instead of echo. TraktUsername doesn't exist, is TasktUser.

[JosemyDuarte]

There is another problem with Python that I don't know if were my fault, so I didn't create a issue for that, but the script gave me this error:

Running virtualenv with interpreter /home/osmc/flexget/bin/python3
Please use the *system* python to run this script
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/virtualenv.py", line 2349, in <module>
    main()
  File "/usr/local/lib/python3.5/dist-packages/virtualenv.py", line 712, in main
    symlink=options.symlink)
  File "/usr/local/lib/python3.5/dist-packages/virtualenv.py", line 927, in create_environment
    site_packages=site_packages, clear=clear, symlink=symlink))
  File "/home/osmc/flexget/lib/python3.5/posixpath.py", line 358, in abspath
    if not isabs(path):
  File "/home/osmc/flexget/lib/python3.5/posixpath.py", line 64, in isabs
    return s.startswith(sep)
AttributeError: 'NoneType' object has no attribute 'startswith'

If you can, take a look at it. Thanks for your effort.