update python packages requirements

install/requirements.txt

 alembic==0.8.4
 argparse==1.2.1
 backlash==0.0.7
-beautifulsoup4==4.3.2
+beautifulsoup4==4.4.0
 caldav==0.4.0
 cliff==1.8.0
-cmd2==0.6.7
+cmd2==0.6.9
 coverage==4.0b1
 crank==0.7.3
 decorator==3.4.0