Updated GitHub issue template.

Author: photonstorm

.github/ISSUE_TEMPLATE.md

@@ -1,3 +1,5 @@
+Before opening this issue _please_ check we haven't already fixed it! Development always takes place in the Phaser `dev` branch. The easiest way to check is to read the [Dev Change Log](https://github.com/photonstorm/phaser/tree/dev#change-log).
+
 This Issue is about (delete as applicable)
 
 * A bug in the API
@@ -6,7 +8,7 @@ This Issue is about (delete as applicable)
 * An error on the web site
 * A problem with my own code
 
-If this is an API error please provide example code showing what happens, and why you don't believe this is the expected behavior. Issues posted without code take _far_ longer to get resolved, sometimes not ever.
+API errors must include example code showing what happens, and why you don't believe this is the expected behavior. Issues posted without code take _far_ longer to get resolved, sometimes not ever.
 
 If your Issue contains _any_ form of hostility it will be instantly closed.
-**Be nice or go away.**
+**Be nice.**

README.md

@@ -323,7 +323,9 @@ You can read all about the philosophy behind Lazer [here](http://phaser.io/news/
 ![Change Log](http://phaser.io/images/github/div-change-log.png "Change Log")
 <a name="change-log"></a>
 
-## Version 2.5.0 - "Four Kings" - 17th June 2016
+## Version 2.5.0 - "Five Kings" - 17th June 2016
+
+**Note:** This version was also released as 2.4.9 'Four Kings' on 16th June 2016. The 2.5.0 release marks us moving to a more strict adherence of the Semver rules, and also contains some TypeScript definitions fixes.
 
 ### New Features