Fixed spelling mistake in widget name
Changed html-markup formatting style in widget's "form" method
Fixed multiple php-notices when adding widget to sidebar
Removed useless parameter of function "register_dl_imgbanner_script"
Fixed spelling mistake in widget form button title
Reformatted plugin's php file
Many corrections of project
fixed some spelling mistakes in php file meta data
Merge pull request #2 from versusbassz/master

Fixed some bugs and spelling mistakes