Tidied iocli exports, build macro tweaks.
Removed 4 overloads of CCommandBase::RunCommand[L] that are no longer used at all, and changed one more to not be exported as it's only used internally to iocli.dll.
fixed builds on platforms that don't support btrace or any form of tracing.
# exists.cif
#
# Copyright (c) 2010 Accenture. All rights reserved.
# This component and the accompanying materials are made available
# under the terms of the "Eclipse Public License v1.0"
# which accompanies this distribution, and is available
# at the URL "http://www.eclipse.org/legal/epl-v10.html".
#
# Initial Contributors:
# Accenture - Initial contribution
#
==name exists
==short-description
Tests if a particular file or directory exists.
==long-description
Returns KErrNone if it does, or either KErrNotFound or KErrPathNotFound otherwise. Intended to be used in conjunction with fshell's C<&&> and C<||> operators.
==argument filename file_name
The name of the file or directory of interest.
==copyright
Copyright (c) 2006-2010 Accenture. All rights reserved.