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+Contributing to Leaflet.MarkerCluster
+=====================================
+
+ 1. [Reporting Bugs](#reporting-bugs)
+ 2. [Contributing Code](#contributing-code)
+ 3. [Building](#building)
+ 4. [Testing](#testing)
+
+## Reporting Bugs
+
+Before reporting a bug on the project's [issues page](https://github.com/Leaflet/Leaflet.markercluster/issues),
+first make sure that your issue is caused by Leaflet.MarkerCluster, not your application code
+(e.g. passing incorrect arguments to methods, etc.).
+Second, search the already reported issues for similar cases,
+and if it's already reported, just add any additional details in the comments.
+
+After you've made sure that you've found a new Leaflet.markercluster bug,
+here are some tips for creating a helpful report that will make fixing it much easier and quicker:
+
+ * Write a **descriptive, specific title**. Bad: *Problem with polylines*. Good: *Doing X in IE9 causes Z*.
+ * Include **browser, OS and Leaflet version** info in the description.
+ * Create a **simple test case** that demonstrates the bug (e.g. using [JSFiddle](http://jsfiddle.net/) or [JS Bin](http://jsbin.com/)).
+ * Check whether the bug can be reproduced in **other browsers**.
+ * Check if the bug occurs in the stable version, master, or both.
+ * *Bonus tip:* if the bug only appears in the master version but the stable version is fine,
+   use `git bisect` to find the exact commit that introduced the bug.
+
+If you just want some help with your project,
+try asking [on the Leaflet forum](https://groups.google.com/forum/#!forum/leaflet-js) instead.
+
+## Contributing Code
+
+### Considerations for Accepting Patches
+
+While we happily accept patches, we're also committed to keeping Leaflet simple, lightweight and blazingly fast.
+So bugfixes, performance optimizations and small improvements that don't add a lot of code
+are much more likely to get accepted quickly.
+
+Before sending a pull request with a new feature, check if it's been discussed before already
+(either on [GitHub issues](https://github.com/Leaflet/Leaflet/issues)
+or [Leaflet UserVoice](http://leaflet.uservoice.com/)),
+and ask yourself two questions:
+
+ 1. Are you sure that this new feature is important enough to justify its presence in the Leaflet core?
+    Or will it look better as a plugin in a separate repository?
+ 2. Is it written in a simple, concise way that doesn't add bulk to the codebase?
+
+If your feature or API improvement did get merged into master,
+please consider submitting another pull request with the corresponding [documentation update](#improving-documentation).
+
+## Building
+
+Install the dependencies:
+```
+npm install -g jake
+npm install
+```
+
+Then to build:
+```
+jake
+```
+Output will be in the ```dist/``` directory
+
+## Testing
+
+To run unit tests:
+```
+jake test
+```