Enabled testing on HHVM on Travis
Marked HHVM as officially supported
Added the external code coverage for Scrutinizer
Added the scrutinizer badges

[ci skip]
Fixed url of the Travis badge

[ci skip]
Don’t perform HTML decoding before returning from `getContent` method
The `getContent` now returns page content as it was received from web server
Merge pull request #60 from aik099/dont-decode-page-html-fix

Don’t perform HTML decoding before returning from `getContent` method