Fixed utf8 chars breaking tests on US Windows

On my US Windows box the default encoding is clobbering the unicode in
the responses. Explicitly setting the encoding on the response streams
fixes the PrettyTimeController and PersonController integration tests.
Update changelog.md
Merge branch 'test-browser-windows-encoding-fix' of https://github.com/t3hc13h/ninja into t3hc13h-test-browser-windows-encoding-fix

Conflicts:
	ninja-core/src/site/markdown/developer/changelog.md
Merge branch 't3hc13h-test-browser-windows-encoding-fix' into develop