Merge pull request #1 from dittertp/master

Remerging changes from master ...
Switch to InitialContext \Stackable instance instead of creating a new one
Refactoring dock block for PBC class loader
Merge pull request #1 from wagnert/master

Switch to InitialContext \Stackable instance instead of creating a new one
Merge pull request #4 from dittertp/master

Switch to InitialContext \Stackable instance instead of creating a new one