update README with open issues

Author: maiflai

README.md

@@ -6,6 +6,36 @@ A plugin to enable the use of Scoverage in a gradle Scala project.
 
 This has now been deployed to maven central.
 
+Current Issues
+==============
+
+Choosing a version
+------------------
+
+Owing to current differences in the gradle Ant and Zinc compilers, there are currently two live releases of this plugin:
+
+Compiler | Plugin version
+--- | ---
+Zinc | **1.0-5-g9c68988**
+Ant | **1.0.6**
+
+Multi-module projects
+---------------------
+
+Please also note that if you have a multi-module project, then [Issues#13](https://github.com/scoverage/gradle-scoverage/issues/13) may apply.
+
+You will therefore need to add the following to each reporting task:
+
+```
+reportScoverage {
+  dependencies {
+    scoverage 'org.scoverage:gradle-scoverage:1.0-5-g9c68988'
+  }
+}
+```
+
+Both of these issues will be addressed in the near future.
+
 Getting started
 ---------------
 ```groovy