Changelog updated, added CONTRIBUTING.md

Author: rolandleth

.github/CONTRIBUTING.md

@@ -0,0 +1,11 @@
+# Contributing
+
+Thank you for taking the time to contribute to the project, it really wouldn't be here without the community's help.
+
+Please follow a few guidelines when contributing:
+
+* follow the existing style for code, documentation and misc files
+* if you're adding a new method / property, document it
+* update `CHANGELOG.md` by checking if the latest version is live (a tag and pod exist):
+	* if it is, then add a new version, usually incrementing the patch (e.g `3.8.9` -> `3.8.10`)
+	* if it isn't, add your changes under the latest version

CHANGELOG.md

@@ -1,3 +1,6 @@
+# 3.8.8
+* Fixed translations.
+
 # 3.8.7
 * Fixed subclassing by changing `LTHPasscodeViewControllerStrings` macro to use `[LTHPasscodeViewController class]` instead of `[self class]`.