Add support to Kinesis Firehose delivery streams metric

[hltbra]

This pull request creates the service Firehose and implements the metric "'Delivery streams per region".

More information on this limit:

• http://docs.aws.amazon.com/firehose/latest/dev/limits.html
• http://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html#limits-akf

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[codecov-io]

Current coverage is 99.94% (diff: 100%)

Merging #216 into develop will increase coverage by <.01%

@@            develop       #216   diff @@
==========================================
  Files            22         23     +1   
  Lines          1665       1679    +14   
  Methods           0          0          
  Messages          0          0          
  Branches        258        254     -4   
==========================================
+ Hits           1664       1678    +14   
  Misses            0          0          
  Partials          1          1          

Powered by Codecov. Last update 6c0714a...b092c67

[jantman]

@hltbra I'm so sorry for letting this sit so long. awslimitchecker is purely a personal time project for me, and I haven't had much time to commit to it lately.

This looks great to me! Would you mind rebasing on develop, and then I'll pull this in for the next release (which should be coming this weekend)?

Thanks!
Jason

[jantman]

Used the "Update branch" button, waiting for tests...

[jantman]

Merging. Thanks so much!

Anticipating a release this weekend.

[hltbra]

No problem, @jantman. Thanks for merging these changes!

[jantman]

This has been released in 0.6.0 and is now live on PyPI