Add newrelic hook
fix api key
Change app name

* Change app name for a generic one,
will capture the app name being deploy.
Add revision variable

* Add revision variable. will grab the last
commit id fron the log.
* Move the api key to be an ENV variable.
* Refactor notice deployment body to use variables
instead of strings.
Add user variable

* Add user vairable using the current
user logged in on terminal.
* Change app name to user the env one
instead of the one in cap file. the one
in cap file differs from the one on new relic
giving an error on deploy.
Change vairable names

* change variable names for app_name
and user for it to not conflict with
the ones on capfile.
Try new way to get the current user
Move new relic vairables outside the recipe

* Move the app name and api key to be on the
capfile.
* Change the user to get the git user instead
of the command line user.
Add description to deployment hook

* Add description variable that will
hold the stage of the project on deploy.
Fix typo
Remove the stage variable

* New relic only tracks deployment
events on production.
Merge pull request #14 from amaabca/LH-3624

Lh 3624