882459: Deprecated message in help for cert-interval
913187: Allow older manifests to print out correctly.

The code was using a dictionary to store json data. If data is missing, then it will throw an exception. This patch ensures that a empty string is returned if no key is present.
Merge pull request #505 from candlepin/wottop/882459

882459: Deprecated message in help for cert-interval
Merge pull request #508 from candlepin/bkearney/913187

913187: Allow older manifests to print out correctly.
912707: Remove a use of the deprecated hasNow() function.
Merge pull request #509 from candlepin/bkearney/912707

912707: Remove a use of the deprecated hasNow() function.
906554: Add ui_repoid_vars line to yum based on the variables which are in the baseurl

Based on research done adding this value to the yum stanza has no negative impacts. This
was tested on RHEL6.4 and Fedora 17.

This patch assumes that yum variables look like

$variable_name

and not

some$variable_nameembedded

Although the latter can be supported.
Merge pull request #503 from candlepin/bkearney/906554

906554: Add ui_repoid_vars line to yum based on the variables which are ...
878634: Use correct capitalization for ID in the rct tool
913720: Use the term order number instead of subscription id
913703: Prefer the use of SKU over Product ID
913302: Support Level and Support Type should be shown as Service Level and Service Type
Merge branch 'master' into alikins/plugins