adding swap_urls command

- this command allows doing the create environment,
  swap, and terminate as separate steps in order
  to run tests against the new environment before
  making it active.
updated README with swap_urls command info
removing extra space character from README
adding configuration option for zdt wait time

- wait time in seconds for environment to transition
  to green state
fixing bad indent
changing location of log message

- so that the wait helper sends the message
PEP8 formatting
fixing typo in waiting message
adding wait_time_in_seconds param to first wait

- so that both wait_for_environments use the wait time
changing poll time for waiting to 10 sec from 5

- to avoid throttling problems during waits
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.
removing PEP8 formatting
merging in bucket region name change
removed unneeded out() statement

- used for debugging
manually removing PEP8 formatting changes
fixing formatting of parse args params
fixing up code indents

- manual PEP8 formatting removal