A few minor changes

I added storm version 0.8.1 to the pom.xml (added a new profile)
I altered package.py so the manifest.txt can look like:
 \# Standard files for Petrel
 logconfig.ini
 $PETREL_DIST/dist/petrel-*-py2.7.egg

for example

Also fixed the mac osx flock issue discussed here: https://github.com/AirSage/Petrel/issues/10