Merge pull request #1 from DanielMichelson/master

Elaborated BALTRAD installation
Caching apt packages

Use `vagrant plugin install vagrant-cachier` to install plugin.

Additional information: https://github.com/fgrehm/vagrant-cachier
SciPy stack install from apt-get and pip
wradlib and some of baltrad working
Additional Baltrad work
Baltrad and wradlib working with system python
Py-ART working using system Python
Merge pull request #4 from jjhelmus/system_python

VM which uses the system Python
Merge branch 'master' of https://github.com/DanielMichelson/oss_weather_radar_vm into DanielMichelson-master

Conflicts:
	provision_scripts/install_baltrad_common.sh
	provision_scripts/install_baltrad_rave_gmap.sh
Merge branch 'DanielMichelson-master'
Added quality plugins for beamb and bropo when installing