MIR Central Test Node DICOM Software Code

Update the usage message. It was behind the implementation.
No change in implementation.

Hard code the element type of 0028 3002 to DCM_US.
This should really depend on the context of the pixel
data. This is a remaining bug to be fixed.

Update the services library to accept all Storage SOP classes
defined in DICOM 2009. Clean up the tables so they follow the
order in the DICOM spec (that part is cosmetic to help me keep
things straight.
Simple_storage modified to accept all Storage SOP classes.
Add a new function to dicom_echo. The -f flag specifies a file
that contains a list of SOP Class UIDs. dicom_echo does not perform
a C-Echo in this case, but walks through the file and tests the
server application to determine if it accepts the SOP Classes.

Modified simple_storage to take -b flag. -b 1 now tells simple_storage to
accept transfer syntaxes from a pre-compiled list. That means we don't need
to grab this from a file.
Added -Y switch to send_image. This is a shortcut for -X. This tells
send_image to propose 3 transfer syntaxes, the 3 non-compression ones.

Add Dose SR object and then several others. This was precipitated
by storing Dose SR.

Pop the error stack after we process each file. Keep the stack from growing.

When dumping error, it is not an error if the attribute is not found.
That just means it did not exist, so removing is not an error.

Remove the calls to clean the message stack.
If we cannot open the file, we eventually want to see the messages.

Comment out another call to dump the call stack.
We probably don't need to see it.

Modify the debug messages to only print when in verbose mode.
Makes things easier for the MESA scripts/tests that don't need
that extra text output.