Restructured the doc directory; added doc/progs; modified some files

to add more up-to-date documentation.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@108 7894878c-1315-0410-8ee3-d5d059ff63e0

doc/developers/sysctl

@@ -0,0 +1,16 @@
+You can access everything under /proc/sys through the sysctl interface. This
+is mostly useful for C programs, which can use the sysctl function. Try
+'man 2 sysctl' for more information.
+
+As each chip gets its own directory under /proc/sys/dev/sensors, you must
+somehow know the sysctl id of these directories to access the sensor data.
+This is done through the file /proc/sys/dev/sensors/chips (see sensors.h
+for the corresponding SYSCTL ids). You can only read this file; it 
+returns an array of struct sensors_chips_data, as defined in sensors.h.
+Each chip will have its own entry here, with both its sysctl id and
+the corresponding /proc name. 
+
+Generally, it is a better idea to use the new libsensors to access this 
+data. If you feel you need more than the library offers, please mail us,
+so we can either add the new functionality to the library, or explain how
+you can work around it.