Add Michael Hale's script for Foundation incident review.
Make incidents-review output CSV.
Rename incidents-review to incidents2csv
Refactor incidents2csv to use off-call

Other changes:
 * Format the date in a format that Google will parse.
 * Added Trello Card column to output.
 * Everything is now configured using the .env file.
 * Added a paginated_get() method to PagerDuty that encapsulates the
   pagination logic.
 * Added an incidents() method.
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# On branch foundation
# Changes to be committed:
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#	modified:   bin/incidents2csv
#	modified:   lib/off-call.rb
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#	incidents.csv
Merge branch 'master' of https://github.com/mdz/off-call into foundation

# Please enter a commit message to explain why this merge is necessary,
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# the commit.
Flesh out documentation.
Fix format.
Merge pull request #1 from flacoste/incidents2csv

Incidents2csv