Hey Guys
I'm not sure if any of your have seen this new thread
http://forum.arduino.cc/index.php?topic=311117.new#new
This is compiling code straight onto the ESP8266 using the Arduino IDE.
You can get an installer exe from the guys website, which puts the files in the Windows Programs (x86) folder, or the technically better approach for Arduino 1.6.x (which is now the current release of the Arduino SW) is to copy the files into use hardware folder in the normal Arduino folder e.g. where the libraries folder is
So I've forked the repo and built a version for 1.6.x
https://github.com/rogerclarkmelbourne/arduinesp
Note. Looking at the current code it seems to be based on some older version of the Arduino, I'm not even sure its Arduino 1.0 as the Hardware Serial class is not derived from the Stream class as it is in Arduino 1.0
However it does work !
Edit
Someone just told me about another Arduino to ESP8266 build