created send_welcome_message method in mailer.rb. Added calls in registration_controller & authentication_controller. Created mail HTML template in views/mailers
updated content of welcome email
added rake task to send welcome email
fixed rspec test not passing
Merge pull request #186 from yggie/mailer

Mailer
renamed rake task file
renamed rake task (forgot to add file to tracking)
forgot to add deliver to mailer
Merge pull request #188 from yggie/mailer

Mailer fix
final merge