Change bucket location checking

I have a bucket in Europe region and ebs-deploy
threw errors because of incorrect location.
After some investigation it turned out that, the `if
statement` required different value that was returned
from aws. I changed the if statement accordingly.
Merge pull request #14 from Syncano/bucket-location-fix

Change bucket location checking
Formatting and fix of string formatting issue

Should fix the following error:
```
File "/usr/local/lib/python2.7/dist-packages/ebs_deploy/__init__.py", line 467, in wait_for_environments
    raise Exception("Wait time for environment(s) "+(" and ".join(environment_names))+" to be "+health+" expired")
TypeError: cannot concatenate 'str' and 'NoneType' objects
```
Log events from ebs to file, formatting