created function to pull auth creds from env variables
wrote test for get-auth-credentials function in identity
Merge branch 'master' of https://github.com/oubiwann/clj-rackspace
merged upstream master
changing environment variable login
Added ENV variable functions
Moved environment variables to constants file
Updated to use empty comparison rather than nil comparisons for username & apikey
Don't use large inline strings for mock data.
Test get-disk methods for username, password, apikey using temp file
Finished explicit login function. Added placeholders in identity_test for new login functions
Merge pull request #19 from scadams/master

Test get-disk methods for username, password, apikey using temp file
Merge branch 'master' of https://github.com/oubiwann/clj-rackspace

Conflicts:
	src/rackspace/util.clj
Merge pull request #20 from mcoupland/master

Added implicit and explicit login
added functions to get additional response variables
Merge pull request #18 from Droogans/external-mock-data

Don't use large inline strings for mock data.
Merge pull request #21 from mcoupland/master

added functions to get additional response variables
Remove unnecessary test, implementation had changed

As part of a previous branch `identity/get-token-data` was refactored
but the test was left in.
Merge pull request #22 from jschairb/remove_unnecessary_test

Remove unnecessary test, implementation had changed
Simple logging mechanism wrapping timbre

This is a primitive mechanism that wraps timbre's default configuration,
which prints to stdout/stderr.

To add logging to a namespace:

```clojure
(ns my-ns
  (:require [rackspace.logging  :refer [trace
                                        debug
                                        info
                                        warn
                                        error
                                        fatal
                                        report]))
```

Then to log information:

```clojure
(debug "Hey, this thing is useful.")
```

This commit will resolve #6.