This went well for some time, but a few days ago, the staging release was updated to 1106 and we have lost more than 5kb available RAM and also gained some compiler warnings.
To get back to a previous staging version 1084, you can enter this into the preferences tab of your arduino IDE:
Code: Select all
http://arduino.esp8266.com/versions/1.6.5-1084-ga39ce29/package_esp8266com_index.json