Added links to open source users page from general pages

README.md

@@ -20,3 +20,4 @@ This documentation comprises these three parts:
 ## More
 * Issues and bugs can be raised on the [Issue tracker on GitHub](https://github.com/philsquared/Catch/issues)
 * For discussion or questions please use [the dedicated Google Groups forum](https://groups.google.com/forum/?fromgroups#!forum/catch-forum)
+* See [who else is using Catch](docs/opensource-users.md)

docs/Readme.md

@@ -17,5 +17,6 @@ Before looking at this material be sure to read the [tutorial](tutorial.md)
 Other
 
 * [Why Catch?](why-catch.md)
+* [Open Source Projects using Catch](opensource-users.md)
 * [Contributing](contributing.md)
-* [Release Notes](release-notes.md)
+* [Release Notes](release-notes.md)

docs/why-catch.md

@@ -35,6 +35,10 @@ So what does Catch bring to the party that differentiates it from these? Apart f
 * Implement test fixtures using Obj-C classes too (like OCUnit)
 * Additional built in matchers that work with Obj-C types (e.g. string matchers)
 
+## Who else is using Catch?
+
+See the list of [open source projects using Catch](opensource-users.md).
+
 See the [tutorial](tutorial.md) to get more of a taste of using CATCH in practice 
 
 ---