Update README.md
Add show action to the api v1 for problems

This allows a problem id to be passed to the problem api and only
information for that problem will be returned.
Add a problems err and notices in api show action
Joined all the attribute readers.
Moved long assignment into smaller more readable lines.
Cleaned the long unreadable statement into smaller seperate lines.
Removed extra empty line at the body end.
Changed to Ruby 1.9+ hash syntax.
Avoid double negation.
Adding file not found handling

If there is no problem for the requested id the api will now correctly
return a 404 status.
Limit the show action to just the problem

This commit backs out the nesting of the error and notices as this would
be better placed in an error or notices route.
Merge pull request #693 from CallumD/add_notices_to_show_action

Add notices to show action
Fallback to ENV['MONGO_URL']

Dokku mongodb plugin compatibility https://github.com/jeffutter/dokku-mongodb-plugin
Merge pull request #710 from glebm/patch-1

Fallback to ENV['MONGO_URL']
Allow app to start w/o ERRBIT_EMAIL_FROM
Add Github_URL env var to Cloud66 configuration
Fix how to deploy to Heroku

`heroku labs:enable user-env-compile` is no longer available,
and the application on Heroku seems to works well without such configuration.
Merge pull request #718 from CodeForKids/master

Add Github_URL env var to Cloud66 configuration
Merge pull request #719 from tricknotes/fix-deploying-in-readme

Fix how to deploy to Heroku in README
use config.protocol instead of hardcoded http