fcm make: class default property declaration

This allows the declarations of default class properties in a normal FCM Make
configuration file.
fcm make: write class props to config-on-success
fcm make: test battery for class props
fcm make: build: prop NS can now be a target key
fcm make: document build.prop target key as NS
FCM::System::Make::Share::Subsystem: fix POD
Merge pull request #65 from matthewrmshin/fcm-make-class-prop

fcm make: *.prop declaration enhancements