Header updates

- Built header navigation dropdown menus for navigation bar. Dropdowns
working effectively but need sizing adjustment and actual link feedback
from client.
Header/Footer/Homepage updates

- Corrected dropdown position bug that prevented bottom links from being
displayed.
- Worked on homepage horizontal slider bug(Images not displaying until
next or prev click sliders are clicked). Still work in progress.
- Corrected footer link styling bug.
- Updated links on header and half of footer to accurately link to
appropriate page. Work still in progress.