allow you to disable dashboard authentication

allow you to disable dashboard authentication by providing empty string '' for username and password
default check standalone value is true
Merge pull request #86 from jlambert121/default_standalone

default check standalone value is true
Don't skips tests for service_server and service_client
Merge pull request #89 from pburkholder/spec_service

Don't skips tests for service_server and service_client
add custom options for sensu_client_config type/provider
add spec tests for sensu_client_config custom options
refactor custom option handling in sensu_check type/provider
Merge pull request #90 from Mayflower/custom-options

Add custom client attributes
Updated to v0.7.5
Fix documentation showing adding refresh value to a check
Merge pull request #91 from bashtoni/master

Documentation fix: refresh values
Purge /etc/sensu/conf.d/{checks,handlers} as well

Currently unmanaged files in these directories won't get purged, even
if $purge_config is set to true. This commit ensures that they do.
Merge pull request #93 from philandstuff/master

 Purge /etc/sensu/conf.d/{checks,handlers} as well
updated purge_configs and file perms
ensure sensu user is present
locked down files with sensitive info
proper scoping for template var
Merge pull request #95 from jlambert121/var_scope

proper scoping for template var
Merge pull request #94 from jlambert121/file_perms

updated purge_configs and file perms