removed installation of ec2 tools and euca2ools from build, as we just use boto now
removed packages that we don't need to install anymore
installing swig, needed for m2crypto
Merge pull request #157 from shatterednirvana/without-ec2-euca2ools-install

No longer installing EC2 tools and euca2ools
Merge pull request #1 from AppScale/testing

bring this up to date
fixed appscale tools return codes
fixed comments
remove spurious exception mention
Merge pull request #159 from briandrawert/fix-appscale-ret-code

Fixed appscale return codes