improve autoLinkHashtags compatibility with IE
improve autoLinkHashtags compatibility with IE

Internet Explorer fails to open links generated by autoLinkHashtags if
the hashtag contains multibyte character(s).
This commit workarounds the issue by using hash property.

twitter/twitter-text,joebos/twitter-text-py,iadvize/javascript-twitter-text-library,masonkmeyer/twitter-text,twitter/twitter-text,twitter/twitter-text,sproutsocial/twitter-text-js,iadvize/javascript-twitter-text-library,ay8s/twitter-text,megaserg/twitter-text,twitter/twitter-text,megaserg/twitter-text,silentroach/twitter-text,zhaoguohui/twitter-text,joebos/twitter-text-py,zhaoguohui/twitter-text,flowdock/flowdock-text,silentroach/twitter-text,ay8s/twitter-text,aaronsakowski/twitter-text,silentroach/twitter-text,megaserg/twitter-text,iadvize/javascript-twitter-text-library,masonkmeyer/twitter-text,masonkmeyer/twitter-text,joebos/twitter-text-py,iadvize/javascript-twitter-text-library,megaserg/twitter-text,zhaoguohui/twitter-text,aaronsakowski/twitter-text,megaserg/twitter-text,ay8s/twitter-text,masonkmeyer/twitter-text,zhaoguohui/twitter-text,joebos/twitter-text-py,ay8s/twitter-text,sproutsocial/twitter-text-js,zhaoguohui/twitter-text,silentroach/twitter-text,ay8s/twitter-text,twitter/twitter-text,aaronsakowski/twitter-text,aaronsakowski/twitter-text,flowdock/flowdock-text,flowdock/flowdock-text,iadvize/javascript-twitter-text-library,sproutsocial/twitter-text-js,masonkmeyer/twitter-text,joebos/twitter-text-py,silentroach/twitter-text,aaronsakowski/twitter-text,joebos/twitter-text-py