Removed unused imported libraries.
Implemented singletone design pattern on mySqlConnector class, also added mroe comments to the code.
Added singletone to both MysqlConnector class and FolderScanner class
Created gitignore file
Delete FolderScanner.class
Delete MysqlConnector.class
Delete PostingFileElement.class
Delete SearchEngine.class
remove file and all of its words from DB