Various improvements to the GCE pricing scraping script:
Various improvements to the GCE pricing scraping script:

1. Allow API key to be specified via env variable
2. Improve module doc string
3. Make sure we don't leak API key in the script output
4. Don't update the file if nothing has changed.

andrewsomething/libcloud,Kami/libcloud,Kami/libcloud,andrewsomething/libcloud,mistio/libcloud,Kami/libcloud,mistio/libcloud,apache/libcloud,apache/libcloud,mistio/libcloud,apache/libcloud,andrewsomething/libcloud