Control Section
---------------
	The Control section of Poco is responsible for making all connections 
to the hardware that controls the telescope. The purpose of the control 
section is to initialize the hardware and translate the Telescope and Interface
sections' commands into a form the controller understands, while also 
translating the values read from hardware into a form that the software can
use. This is separated so that a change in control hardware has a 
minimal impact on the rest of the program.
	The Control section is composed of the classes CControl, CGalilCard,
CControlSim, and Cdda0x. CControl is a pure virtual base class. CGalilCard
is derived from CControl and is used to communicate with a Galil motor
control card and a digital to analog control card. CControlSim is also derived
from CControl, but its purpose is to simulate hardware so that the Telescope
and Interface sections can be tested without being connected to physical 
hardware. 
	In the this incarnation, Control talks to a Galil 1800 motor control 
card and a digital IO card with digital to analog converters. Most of the 
code is centered around initializing the hardware and starting the 
appropriate threads. If the Galil control card can't be used at some point 
in the future, a new class can be created that is based on CControl and 
defines the virtual functions. This should require very few changes to the
Interface and Telescope sections, but changes will need to be made to
most of the configuration files.
	The CControl class has one other important function. It triggers
the code that controls telescope movement in CTelescope by passing the 
most recent position information to the CTelescope object.


    CControl Virtual Functions
    --------------------------
    int vInitializeAxis() - A pure virtual function used to initialize a 
	single axis.
    void vStartController() - A pure virtual function used to start normal
	communications with the hardware after initialization is done.
    int vRunThreads() - A pure virtual function use to run communications 
	threads	made by Control.
    void vHaltThreads() - A pure virtual function used to stop threads 
 	made by Control.
    int  vHandleMsgs(CQMsg *pmsg) - A pure virtual function used to handle
	CEventThread messages.
    void vStopMotion(char axis) - A pure virtual function used to stop motion
	on an axis.
    void vSetAccel(char axis, int accel) - A pure virtual function that
	sets acceleration for an axis.
    void vSetDecel(char axis, int decel) - A pure virtual function that sets 
	deceleration for an axis. 
    int  vMoveAtSp() - A pure virtual function that is used get the motor on 
	the specified axis at the specified speed.
    int  vHardwareInterfacePaddle() - A pure virtual function used to monitor 
	the status of a hardware paddle connected to Poco.
    int  vHardwareInterfaceJoy() - A pure virtual function used to monitor
	the status of a hardware joystick connected to Poco.
    int vGetPos() - A pure virtual function used to get the most recent
	position reading from the controller. 
    double vGetSp() - A pure virtual function that gets the most recent speed 
	from the controller.
    double vGetAcc() - A pure virtual function that gets the most recent 
	acceleration from the controller. 
    void   vPrintQueues() - A pure virtual function for printing the last 
	several commands sent to the hardware, and the basic hardware response
	to each.
    int vSlewMotorMove() - A pure virtual function that starts, stops, or 
	changes the power setting of the slew motor for the specified axis.
    int vSlewMotorState() - A pure virtual function that returns
	whether the slew motor for the given axis is on or off.
    int vGetActiveMotorSystem() - A pure virtual function that returns which
	motor system (slew or guide) is being used on the given axis.
    void vGetRoughPos() - A pure virtual function that returns the last
	position of the axis from the rough position pots, or some other
	backup position device. 
    void vGetLimits() - A pure virtual function that is used to find 
	out if any of the limit switches have been tripped. 
    double vGetSecsBetweenUpdates() - A pure virtual function that returns the
	number of seconds that passed between the last position read and
	the current position read.
    double vGetSecsBetweenPIDUpdates() - A pure virtual function that returns
	the minimum amount of time between information updates  to the 
	Telescope and Interface sections.