Imporved `relining` method by adding `opt_force` param;
Fixed `unlining` method;
Fixed text rending in effect module;
Removed `data-lining` if browser don't support lining.js;
Fixed `unlining` and `relining` method if browser don't support lining.js;
Fixed bug when lining same element three times
Updated index page: added more document and demo;
Updated index page; Added README.md;