Disable cross-domain access by default. See GH-89 and GH-63.
better debug message
DOC,TST: document that Splash returns utf8-encoded data and add tests for that. Fixes GH-88.
add comments about some edge cases in redirect detection
Merge pull request #90 from scrapinghub/no-iframes-hack-by-default

[MRG] Disable cross-domain access by default.
Merge branch 'master' into request-filters-and-logging

Conflicts:
	splash/defaults.py
	splash/tests/utils.py