docs(compile/multidir): description for compile/multidir error

Closes #3459

Author: mhevery

docs/content/error/compile/multidir.ngdoc

@@ -2,3 +2,15 @@
 @name $compile:multidir
 @fullName Multiple Directive Resource Contention
 @description
+
+This error occurs when multiple directives are applied to the same DOM element, and processing them would result in an collisions or unsupported configuration.
+
+
+To resolve this issue remove one of the directives which is causing the collision.
+
+Example scenarios of multiple incompatible directives applied to the same element include:
+
+* Multiple directives requesting `isolated scope`.
+* Multiple directives publishing a controller under the same name.
+* Multiple directives declared with the `transclusion` option.
+* Multiple directives attempting to define a `template` or `templateURL`.