- Removed `dart build.dart` from `drone/run.sh` for pa, pa_blank (were breaking tests)
- Added `cd ..` to `drone/run.sh` (was breaking tests)
- removed `allowUnsafeEval` flag from `chrome_packaged_app.dart:creatDartCompilerTask`
- added `var jsContext = js.context` to cache js.context and avoid "no such method" warning in `chrome_packaged_app.dart`

Signed-off-by: Claudio d'Angelis <claudiodangelis@gmail.com>