Consider to mark *-component project as deprecated

[zerg000000]

Currently, the *-component projects under duct-framework is quite confusing, since the concept of component have been replaced by integrant. keep these projects without deprecation will be quite confusing for new comer.

[weavejester]

The libraries themselves aren't deprecated; they're still useful for Component-based systems. However, maybe I can put a notice in their READMEs.