The AddThis.com social buttons according to Homework 6 part 2.
Signed-off-by: Ubuntu <ubuntu@ip-172-31-42-61.us-west-2.compute.internal>
Google Analytics code added. As per Homework 6 part 3.
Signed-off-by: Ubuntu <ubuntu@ip-172-31-42-61.us-west-2.compute.internal>
Coinbase added as part of Homework 6 part 4.
Signed-off-by: Ubuntu <ubuntu@ip-172-31-42-61.us-west-2.compute.internal>