Enabling textile custom styling (http://www.redmine.org/issues/2416).

This commit is to integrate the change from this revision:  http://www.redmine.org/projects/redmine/repository/revisions/8860.
Enabling textile custom styling (http://www.redmine.org/issues/2416).

This commit is to integrate the change from this revision:  http://www.redmine.org/projects/redmine/repository/revisions/8861.
Removing commented line.
Merge pull request #6 from tipitnet/feature-textyle_custom_styles

Feature textyle custom styles