Merge pull request #40 from stgraber/master

Clarify API version, auth and password prompts
Update the readme on building/running the app

Closes #41

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
fix typo

Signed-off-by: Shuai Zhang <zs.broccoli@gmail.com>
Merge pull request #42 from shuai-z/fix-typo

fix typo
Merge pull request #43 from tych0/readme-update

Update the readme on building/running the app
Drop the ping command

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Fix a whitespace issue

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