Merge branch 'release/0.31.2'

Author: jansiegel

CONTRIBUTING.md

@@ -5,10 +5,11 @@ Your contributions to the project are very welcome. If you would like to fix a b
 To help us merge your Pull Request, please make sure you follow these points:
 
 1. Please make your fix on a separate branch. This makes merging much easier.
-2. Do not edit files in `dist/` directory (e.g: `handsontable.js`, `handsontable.css`, `handsontable.full.js`, `handsontable.full.css`). Instead, try to edit files inside the `src/` directory and then use `grunt` to make a build. More information about this on wiki page [Building](https://github.com/handsontable/handsontable/wiki/Building).
-3. **Very important:** For any change that you make, **please try to also add a test case(s)** in `tests/jasmine/spec/` or `src/3rdparty/walkontable/test/jasmine/spec/`. This helps us understand the issue and make sure that it will stay fixed forever. See [Testing](https://github.com/handsontable/handsontable/wiki/Testing)
-4. **Very important:** Please review our [coding style](https://github.com/handsontable/handsontable/wiki/Coding-style) for instructions on how to maintain a fork and submit patches.
-5. Describe the problem in the Pull Request description (of course you would do it, why do I mention that?)
+2. Always make the target of your pull request the `develop` branch, not `master`
+3. Do not edit files in `dist/` directory (e.g: `handsontable.js`, `handsontable.css`, `handsontable.full.js`, `handsontable.full.css`). Instead, try to edit files inside the `src/` directory and then use `grunt` to make a build. More information about this on wiki page [Building](https://github.com/handsontable/handsontable/wiki/Building).
+4. **Very important:** For any change that you make, **please try to also add a test case(s)** in `tests/jasmine/spec/` or `src/3rdparty/walkontable/test/jasmine/spec/`. This helps us understand the issue and make sure that it will stay fixed forever. See [Testing](https://github.com/handsontable/handsontable/wiki/Testing)
+5. **Very important:** Please review our [coding style](https://github.com/handsontable/handsontable/wiki/Coding-style) for instructions on how to maintain a fork and submit patches.
+6. Describe the problem in the Pull Request description (of course you would do it, why do I mention that?)
 
 Thank you for your commitment!