Add git and pkg-config as a depdendency

Signed-off-by: Chuck Short <chuck.short@canonical.com>
Merge pull request #71 from zulcss/master

Add git and pkg-config as a depdendency
Merge pull request #70 from stgraber/master

Some REST changes
rest-api: Be a bit more RESTful

 - Drop all of the container actions and instead use /state for that
   with GET/PUT.
 - Rework files to use GET/PUT.
 - Add shell examples.

Reported-by: William Grant
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>