update readme, build pre_build bin

README.md

@@ -28,6 +28,15 @@ Tencent QQ group: 309957875<br />
 - cross compiler
 
 # Change log
+2015-02-12<br />
+fix float print.<br />
+update spiffs, add file.rename api to file module.<br />
+fix some file system bug. need more tests.<br />
+add support to 8Mbyte, 16Mbyte flash.<br />
+remove node.led() and node.key() api.<br />
+some update to lua_modules and examples.<br />
+build latest pre_build bin.
+
 2015-01-27<br />
 support floating point LUA.<br />
 use macro LUA_NUMBER_INTEGRAL in user_config.h control this feature.<br />
@@ -44,27 +53,6 @@ added LUA examples and modules [by dvv](https://github.com/dvv). <br />
 added node.readvdd33() API [by alonewolfx2](https://github.com/alonewolfx2).<br />
 build pre_build bin.
 
-2015-01-24<br />
-migrate to sdk 0.9.5 release.<br />
-tmr.time() now return second(not precise yet). <br />
-build pre_build bin.
-
-2015-01-23<br />
-merge mqtt branch to master.<br />
-build pre_build bin.
-
-2015-01-18<br />
-merge mqtt module to [new branch mqtt](https://github.com/nodemcu/nodemcu-firmware/tree/mqtt) from [https://github.com/tuanpmt/esp_mqtt](https://github.com/tuanpmt/esp_mqtt).<br />
-merge spi module from iabdalkader:spi. <br />
-fix #110,set local port to random in client mode.<br />
-modify gpio.read to NOT set pin to input mode automatic.<br />
-add PATH env with C:\MinGW\bin;C:\MinGW\msys\1.0\bin;C:\Python27 in eclipse project. resolve #103.
-
-2015-01-08<br />
-fix net.socket:send() issue when multi sends are called. <br />
-*NOTE*: if data length is bigger than 1460, send next packet AFTER "sent" callback is called.<br />
-fix file.read() api, take 0xFF as a regular byte, not EOF.<br />
-pre_build/latest/nodemcu_512k_latest.bin is removed. use pre_build/latest/nodemcu_latest.bin instead.
 
 [more change log](https://github.com/nodemcu/nodemcu-firmware/wiki)<br />