Fix channel password example, add example for channel with different prefix than hash
example_full.yml: Fix channel password example, add example for channel with non-default prefix, add example for twitter bearer token, unify the general styling (cases, line width), change some wordings
Move imgur_auth.py to pyfibot/util/ where it belongs
Move imgur_auth.py to pyfibot/util/ where it belongs
Merge pull request #155 from aapa/example-fix

Fixes to example_full.yml, move imgur_auth to pyfibot/util/