Added failing test for urls starting with // in HTML
Support urls starting with // in HTML::script and HTML::style
Added failing test to provider_style for urls starting with //
incorrect mention of the missing method Request::instance
Merge pull request #550 from kohana/3.3/docfix/R4820/incorrect-mention-of-missing-request-instance-method

R4820 incorrect mention of the missing method Request::instance

fixes #455
related to R4813, removes redundant notice disabling lines

`mb_convert_encoding`, unlike `iconv`, does not emit `E_NOTICE`
Merge pull request #551 from kohana/3.3/bugfix/R4813/remove-error_reporting

related to R4813, removes redundant notice-disabling lines
Merge pull request #549 from Sakto/3.3/develop

Support URLs starting with // in HTML::script and HTML::style