Extend in-code comments in regards to missing properties

[wick-ed]

Some pthreads specialities lead to omitting explicit property implementation. These missing properties make the code harder to read.
To counter this issue the affected classes should be annotated using the @property annotation.
This enables IDEs to pick up dynamic properties and their types.

UAC:

• All dynamically defined properties MUST be represented by a @property annotation

[wick-ed]

Will also add missing PSR interface methods as comments