Add support for 'real' keys & values #86
Description
In both of the manifests I've been working on - AirServer & DetectX Swift - both use real number keys (<real></real>) in some capacity.
However, it appears that when real numbers are used as part of a preference in a manifest, the preference doesn't appear at all. Here is an example:
<dict>
<key>pfm_name</key>
<string>SUScheduledCheckInterval</string>
<key>pfm_type</key>
<string>real</string>
<key>pfm_description</key>
<string>Frequency to complete automatic software update checks.</string>
<key>pfm_range_list</key>
<array>
<real>3600</real>
<real>86400</real>
<real>604800</real>
<real>2629800</real>
</array>
<key>pfm_range_list_titles</key>
<array>
<string>Hourly</string>
<string>Daily</string>
<string>Weekly</string>
<string>Monthly</string>
</array>
</dict>