Donation link in donation block is fixed

reference -> code4aap/drupal-webroot#18

aap_campaign_tracker.js file is added and aap_theme.info is modified
hover color of top navigation link is fixed

reference -> code4app/drupal-webroot#19

_layout.scss is modified
Merge branch 'issue18' of https://github.com/tkuldeep/drupal-webroot
Merge branch 'issue19' of https://github.com/tkuldeep/drupal-webroot