Remove URI filter for parenthesis and dollar symbols, as talked in #47.

Signed-off-by: Razican <admin@razican.com>
Fixed return.

Signed-off-by: Razican <admin@razican.com>
Fixed tests

Signed-off-by: Razican <admin@razican.com>
Merge pull request #3323 from Razican/remove-uri-filter

Remove conversion of 'programmatic characters' to HTML entities in CI_URI::filter_uri()

Close #47