fixes for eclipse
removed package protected on some fields so that subclasses could access the fields
Merge pull request #206 from stuckless/master

removed package protected on some fields so that subclasses could access...
Crash fix for a case where the EndCallback is not set and used
Merge pull request #209 from robUx4/endcallback_npe_fix

Crash fix for a case where the EndCallback is not set and used
potential fix for selector exception in L preview.

https://github.com/koush/AndroidAsync/issues/196