use root 5.22 for travis-ci testing

As done for 5.18, build on an amazon virtual machine running ubuntu
12.04 LTS, then uploaded to copy.com
SusyNtSys: add missing include

Causing a compilation error on SusyNtuple_Dict.
Caught with travis-ci automatic testing! :-)
Merge pull request #37 from gerbaudo/build-root-5-22

package root 5.22 for travis-ci