Move location of the skip link

[ashleykolodziej]

Fixes #245

Changes proposed in this pull request

• Move the location of the skip link to directly underneath the opening body tag to avoid placement conflicts.

Test sites

Clone these sites to your sandbox, and review them briefly. Does everything work as expected?

• Kitchen Sink Site http://10up-responsi.cms-devl.bu.edu/kitchensink/
• BU Landing Pages http://10up-responsi.cms-devl.bu.edu/bu-landing-pages/
• BU Banners http://10up-responsi.cms-devl.bu.edu/bu-banners/
• Faculty Model Site (color palettes) http://10up-responsi.cms-devl.bu.edu/facultymodel/
• BU Bands (light custom CSS) http://10up-responsi.cms-devl.bu.edu/bands/
• Data Sciences (complex custom CSS) http://10up-responsi.cms-devl.bu.edu/cds-faculty/
• Provost Advising (child theme) http://10up-responsi.cms-devl.bu.edu/advising/

Review checklist

• I have tested my changes in my sandbox on Responsive Framework and at least one child theme.
• I have tested any new filters or action hooks I have introduced in a child theme to ensure they work correctly.
• I've reviewed the contribution guidelines.
• I've updated CHANGELOG.MD with a brief explanation of the changes in this pull request in the unreleased section.
• My code follows BU Coding Standards.