Main table of employees was changed

*Main page style was changed
*Back to top scroll-button was added
*Main menu was added to all pages
*Amount of employees field when adding department was removed
*Unnecessary java script was removed
*Add department result information was added
*Check for exception's in "add employees to department" option was added
*Employees search result's style were changed
*Signature of database's method's were changed
*Departments list style was changed
*JSP pages import was added
*Information after employee deleting was added
*Configuration of database connection was changed