allow you to disable dashboard authentication

allow you to disable dashboard authentication by providing empty string '' for username and password
Allow setting RUBYOPT

Allows me to work around http://projects.puppetlabs.com/issues/22762
update puppet versions, add ruby 2.0, remove ruby-head
update travis/rake config again
Added sensu::manage_services to optionally disable internal service management.
Added 'undef' handling of $sensu::manage_services
Merge pull request #113 from vmadman/master

Added sensu::manage_services to optionally disable internal service management.
Merge pull request #109 from doismellburning/rubyopt

Allow setting RUBYOPT
Merge pull request #82 from chaoranxie/patch-2

allow you to disable dashboard authentication
Incremented to v0.7.6
Changed module name
Merge pull request #111 from jlambert121/travis_update

update puppet versions, add ruby 2.0, remove ruby-head
Incremented to v0.7.7
Merge git://github.com/sensu/sensu-puppet