chore: create release notes

release-notes/0.14.0.md

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+# Release notes for cobrapy 0.14.0
+
+## New features
+
+* Adding boundary reactions is now much more flexible and accepts 
+  user-defined identifiers.
+* It is now possible to run FVA and loopless FVA in parallel.
+* Some utilities and an example of how to perform static optimization dynamic
+  FBA. 
+* There now is a global configuration singleton `cobra.Configuration()` that 
+  can be used to set default bounds for newly created reactions and set a 
+  default solver for all newly created or parsed models.
+* Setting a time limit on solvers now still allows users to retrieve the flux
+  distribution at the point of time out.
+
+## Fixes
+
+* Infinity values are now properly handled and passed down to optlang.
+* Properly update the model objective on leaving a model context.
+* New metabolites are now included in the gapfilling process.
+
+## Deprecated features
+
+* We are deprecating a special case of lower and upper bound behavior. Please
+  read more about it in #793 and let us know what you think.
+
+## Backwards incompatible changes
+
+* The old solver interfaces that were deprecated for a long time have been 
+  removed.
+
+## Documentation
+
+* Better documentation for the minimal medium functionality.
+* Additions to the contribution guidelines.
+
+## Internal
+
+* Improve indexing for `find_blocked_reactions`.
+* Adjust the test suite for pytest 4.0 and update the configuration.
+* The module structure and corresponding tests are broken up and re-organized.
+