Fix license classifier in setup.py

When redirecting output to a file sys.stdout.encoding is None, so use
sys.getdefaultencoding() instead.

When output is redirected sys.stdout.encoding is None. Fix this by
always encoding to utf-8, assuming gitlab handles that. The encoding
used by the local system is irrelevant here.

Closes #30

Fix encoding errors on display and update with redirected output

Closes #28

Gitlab expects an int (1 or 0) as value for boolean attributes.
Transform python bool's into int's when creating or updating objects.

Closes #22