Fix broken link for 'Python on the Mac'

Bad link was http://www.python.org/getit/mac/
Good link is https://www.python.org/download/mac
Fix broken link for 'Python on the Mac'

Bad link was http://www.python.org/getit/mac/
Good link is https://www.python.org/download/mac
removed unnecessary newline at </html> tage
Merge pull request #91 from kmolo/master

Fix for Issue# 90 -- fixed broken links