Update deployer to 0.3.1

Update deployer to 0.3.1

Update the juju-deployer package to the newer version.
As a consequence, improve the bundle deployment feedback.

Tests: `make unittest`.

QA:
1) deploy the charm by bootstrapping juju and 
then running `make deploy`.

2) wait for the service to be ready/started.

3) Open the GUI.

4) Try to deploy this bundle file:
http://pastebin.ubuntu.com/6844154/

5) You should see an error in the GUI: 
The deployment errored: Invalid config charm 
cs:~openstack-ubuntu-testing/precise/mysql-4 
no-such-option=42

6) Try to deploy this bundle file:
http://pastebin.ubuntu.com/6844187/

7) You should see an error in the GUI: 
The deployment errored: Invalid relation in config, 
service no-such not found, 
rel mediawiki:db <-> no-such:db

Done, thank you!

https://code.launchpad.net/~frankban/charms/precise/juju-gui/deployer-031/+merge/203999

(do not edit description out of merge proposal)

[frankban, 2014-01-30 15:26:07]

Please take a look.

[gary.poster, 2014-01-30 15:35:04]

LGTM

[jeff.pihach, 2014-01-30 19:03:48]

LGTM QA OK (from Makyo)

[frankban, 2014-01-31 08:59:33]

*** Submitted:

Update deployer to 0.3.1

Update the juju-deployer package to the newer version.
As a consequence, improve the bundle deployment feedback.

Tests: `make unittest`.

QA:
1) deploy the charm by bootstrapping juju and 
then running `make deploy`.

2) wait for the service to be ready/started.

3) Open the GUI.

4) Try to deploy this bundle file:
http://pastebin.ubuntu.com/6844154/

5) You should see an error in the GUI: 
The deployment errored: Invalid config charm 
cs:~openstack-ubuntu-testing/precise/mysql-4 
no-such-option=42

6) Try to deploy this bundle file:
http://pastebin.ubuntu.com/6844187/

7) You should see an error in the GUI: 
The deployment errored: Invalid relation in config, 
service no-such not found, 
rel mediawiki:db <-> no-such:db

Done, thank you!

R=gary.poster, jeff.pihach
CC=
https://codereview.appspot.com/55230044

[frankban, 2014-01-31 09:39:13]

Thank you!