Build separate packages for Python 2 / 3 - fix bad version parsing

Author: mohierf

.travis.yml

@@ -60,6 +60,7 @@ jobs:
       install:
         # Install packaging requirements
         - echo "Installing packaging requirements..."
+        - pip install -r requirements.txt
       script:
         - echo "Packaging for BinTray..."
         - ./package.sh $TRAVIS_BRANCH $TRAVIS_PYTHON_VERSION deb

package.sh

@@ -75,7 +75,7 @@ pkg_description="Alignak web services module for Alignak"
 pkg_url="http://alignak.net"
 pkg_team="Alignak Team (contact@alignak.net)"
 
-version=`python -c "from alignak_backend import __version__;print(__version__)"`
+version=`python -c "from version import __version__;print(__version__)"`
 version_date=`date "+%Y-%m-%d"`
 
 mkdir -p dist