Added support for older OS X releases back to 10.6 included.

Apart from turning off Auto Layout for the Demo project, the only
thing remaining was several __weak qualifiers to prevent retain
cycles in blocks. I have replaced them with __unsafe_unretained
since __weak is not supported on 10.6. There should be no safety
concerns here, since we are certain the pointers will remain valid.

1 files changed, 3 insertions, 0 deletions

diff --git a/CHANGES b/CHANGES
index 8237ae6..115c78f 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+Unreleased yet
+    - Added support for older OS X versions down to 10.6 included.
+
 2.0.1 2015/1/9
     - Trivial Podspec fix.