Bugfixes and added settings page

Changed zepto.js (added selectors.js)
Fixed selectors for podjetnik.si, bolha.com, finance.si, avto.net and added feri-uni-mb.si.
Added settings for domain excluding.
Added key "holder" in selectors. Should be used when button is not in node;  node is then used to identify if button should be clicked (check podjetnik.si for example).