Removed the "beta" suffix (for v0.6.0)

Author: leekelleher

appveyor.yml

@@ -6,7 +6,7 @@ version: 0.6.0.{build}
 # UMBRACO_PACKAGE_PRERELEASE_SUFFIX if a rtm release build this should be blank, otherwise if empty will default to alpha
 # example UMBRACO_PACKAGE_PRERELEASE_SUFFIX=beta
 init:
-  - set UMBRACO_PACKAGE_PRERELEASE_SUFFIX=beta
+  - set UMBRACO_PACKAGE_PRERELEASE_SUFFIX=
 
 cache:
   - src\packages -> **\packages.config  # preserve "packages" directory in the root of build folder but will reset it if packages.config is modified