Include documentation in the application

doc/usage-examples.markdown

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+Usage examples
+==============
+
+You can customize your boards according to your business activities:
+
+Software development
+--------------------
+
+- Backlog
+- Ready
+- Work in progress
+- To be validated
+- Validated
+- Deployed in production
+
+Bug tracking
+------------
+
+- Reported
+- Confirmed
+- Work in progress
+- Tested
+- Fixed
+
+Sales
+-----
+
+- Leads
+- Meeting
+- Proposal
+- Purchase
+
+Lean business management
+------------------------
+
+- Ideas
+- Development
+- Measure
+- Analysis
+- Done
+
+Recruiting process
+------------------
+
+- Job offers
+- Candidates
+- Phone screens
+- Interviews
+- Hires
+
+Online shops
+------------
+
+- Orders
+- Packaging
+- Ready to send
+- Shipped
+
+Manufactory
+-----------
+
+- Customer Orders
+- Assembly
+- Tests
+- Packaging
+- Ready to ship
+- Shipped