Documentation update

- mention analogWriteRange and analogWriteFreq
- update change log
- add pwm output symbol for pin 16 to svg

doc/changes.md

@@ -2,11 +2,27 @@
 title: Change log
 ---
 
-
+*Future release*
 
 ### Core
 
-- Updated I2C library to better handle repeated start for certain devices.
+- I2C library updated to better handle repeated start for certain devices,
+  improved waveforms, higher frequencies for 160MHz core clock, fix case where
+  using different pins would not work with libs calling begin internally.
+- Add Adafruit HUZZAH board
+- Add SparkFun Thing board
+- Add SweetPea ESP-210 board
+- Add eboot bootloader
+- Timer0 support
+- Add PWM range and frequency control
+- Add ESP.eraseConfig method
+- Fix pin change interrupt handling (#322)
+- Add SLC and I2S register definitions
+- Fix math functions calling themselves recursively (#233, #354)
+- Print stack on exception and soft WDT reset
+- Add Updater class
+- Remove implementations of WDT-related functions
+- Provide selection between A0 and VCC (#443, #338)
 
 ### Libraries
 
@@ -14,11 +30,21 @@ title: Change log
   add setContentSize method.
 - ESP8266WiFi: add BSSID, channel, isHidden methods, fix AP/STA mode
   selection (#28).
+- Better handling of WiFi disconnect (#231)
+- Add API to set the beginning of local ports range for WiFiClient.
+- Add RSSI function
+- Add function to get the MAC / BSSID as String
+- Servo library support
+- Add ESP8266WiFiMesh library
+- Add ESP8266SSDP library
 
 ### Tools
 
-- SDK updated to 1.1.0 (#306)
+- Update SDK to v1.2.0_15_07_03
+- Better sketch size reporting (#314)
+- Update esptool to 0.4.5
 
+---
 
 ## 1.6.4-673-g8cd3697
 May 22, 2015