BLD: set version number in VERSION.txt
BLD,TST: add before_install with apt-get python-apt, aptitude
Merge branch 'hotfix/0.1.1'

* hotfix/0.1.1:
  BLD,TST: add before_install with apt-get python-apt, aptitude
  BLD: set version number in VERSION.txt
Merge tag '0.1.1' into develop

Release 0.1.1 (hubfluw hotfix)

* tag '0.1.1':
  BLD,TST: add before_install with apt-get python-apt, aptitude
  BLD: set version number in VERSION.txt