Add notes for R1-1

RELEASE.md

@@ -13,6 +13,17 @@ files respectively, in the configure/ directory of the appropriate release of th
 Release Notes
 =============
 
+### R1-1 (October XXX, 2019)
+----
+* Added support for register caching
+  * This improves the performance by over a factor of 100 when setting a feature, because ADGenICam reads
+    all of the features when any feature was changed.
+  * The constructor and aravisConfig have a new enableCaching argument to enable or disable register caching.
+    It should be set to 1 except perhaps for some unusual cameras that do not correctly handle register caching.
+* This release requires a recent version of the aravis package, currently the master branch as of October 10, 2019.
+  This should be released soon as the ARAVIS_0_7_2 tag.
+  * This version of aravis adds support for register caching.
+  * This version has changes to the aravis API for several functions.
 
 ### R1-0 (August 12, 2019)
 ----