docker/fig — pull request #529 by chmouel (2014-10-08 18:22:38+00:00)
Title: Allow overriding environements on command line

Add a new command line option -e to override environement variables when
running a service. Syntax is -e option1:value1,option2:value2 which is
not ideal but it does not seem that docopt support repeatable options.

Signed-off-by: Chmouel Boudjnah