Better topbar .active and :hover bg control + text-decoration for a:hover

- Better topbar .active and :hover bg control. (added 2 new variables for topbar)
- Placed a '>' in topbar that was needed to get the right result (the .active bg color was given to every link in the dropdown/childs).
- text-decoration for a:hover (added a new variable for typography)
- Added the wordpress theme WPF to readme