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+Warning
+-------
+This tool will allow you to write values to the SMC which could irreversably damage your
+computer.  Manipulating the fans could cause overheating and permanent damange.  
+*USE THIS PROGRAM AT YOUR OWN RISK!*
+
+Background
+----------
+I created this program because I was unhappy with my MacBook Pro running so hot and it
+annoyed me that Apple didn't make any way for end users to set fan preferences.
+
+This program will allow you to read and write values to the SMC using the AppleSMC kernel
+extension.  The purpose of this is to show how to talk to the controller.  I've made no
+effort to make it user friendly, however I'm releasing this in hopes that someone will
+take the next logical step and make a nice *free* GUI. I think it's absurd that some
+people are trying to charge for simple programs to manipulate this type of data.
+
+In my testing I've been able to lower the average system temperature by 15C just
+by running the fans at a low speed like 3500 RPM, which you can barely hear.
+
+Usage 
+------
+`smc -h`
+
+
+```bash
+Apple System Management Control (SMC) tool 0.01
+
+Usage:
+./smc [options]
+    -f         : fan info decoded
+    -h         : help
+    -k <key>   : key to manipulate
+    -l         : list all keys and values
+    -r         : read the value of a key
+    -w <value> : write the specified value to a key
+    -v         : version
+```
+
+Fan control 
+-----------
+To decode:  
+`smc -f`
+
+To manually query and control:
+`FNum` - tells you how many fans are in the system
+
+To read data from each fan:
+```F0Ac - Fan current speed
+F0Mn - Fan minimum speed
+F0Mx - Fan maximum speed
+F0Sf - Fan safe speed
+F0Tg - Fan target speed
+FS!  - See if fans are in automatic or forced mode
+```
+
+[Replace `0` with fan #.  In the MacBook Pro there two fans so this applies for `0` (left)
+ and `1` (right).]
+
+To set a fan to a specific speed:
+
+`FS!`  Sets "force mode" to fan.  
+    - Bit 0 (right to left) is fan 0, bit 1 is fan 1, etc.  
+`F0Tg` - Sets target speed, make sure you fp78 encode it (left shift by 2)
+
+
+For example, to force both fans to 3500 RPM:  
+`python -c "print hex(3500 << 2)"`
+0x36b0
+
+`smc -k "FS! " -w 0003`    
+`smc -k F0Tg -w 36b0`    
+`smc -k F1Tg -w 36b0`
+
+..to force fan 0 to 4000 RPM and leave fan 1 in automatic mode:  
+`smc -k "FS! " -w 0001`  
+`smc -k F0Tg -w 3e80` 
+
+..to return both fans to automatic mode:  
+`smc -k "FS! " -w 0000`
+
+Temperature sensors
+-------------------
+TB0T   
+TC0D  
+TC0P  
+TM0P  
+TN0P  
+Th0H  
+Ts0P  
+TN1P  
+Th1H
+
+Light sensors
+-------------
+ALV0 - Left   
+ALV1 - Right 
+
+Motion sensors
+--------------
+MO_X  
+MO_Y  
+MO_Z