Reorganized source tree. Moved client.cpp into cmd/synergy as

synergy.cpp and server.cpp into cmd/synergyd as synergyd.cpp.
Moved and renamed related files.  Moved remaining source files
into lib/....  Modified and added makefiles as appropriate.
Result is that library files are under lib with each library
in its own directory and program files are under cmd with each
command in its own directory.

lib/base/XBase.cpp

@@ -0,0 +1,95 @@
+#include "XBase.h"
+#include <cerrno>
+#include <cstdarg>
+
+// win32 wants a const char* argument to std::exception c'tor
+#if WINDOWS_LIKE
+#define STDEXCEPTARG ""
+#endif
+
+// default to no argument
+#ifndef STDEXCEPTARG
+#define STDEXCEPTARG
+#endif
+
+//
+// XBase
+//
+
+XBase::XBase() :
+	exception(STDEXCEPTARG),
+	m_what()
+{
+	// do nothing
+}
+
+XBase::XBase(const CString& msg) :
+	exception(STDEXCEPTARG),
+	m_what(msg)
+{
+	// do nothing
+}
+
+XBase::~XBase()
+{
+	// do nothing
+}
+
+const char*
+XBase::what() const
+{
+	if (m_what.empty()) {
+		m_what = getWhat();
+	}
+	return m_what.c_str();
+}
+
+CString
+XBase::format(const char* /*id*/, const char* fmt, ...) const throw()
+{
+	// FIXME -- lookup message string using id as an index.  set
+	// fmt to that string if it exists.
+
+	// format
+	CString result;
+	va_list args;
+	va_start(args, fmt);
+	try {
+		result = CStringUtil::vformat(fmt, args);
+	}
+	catch (...) {
+		// ignore
+	}
+	va_end(args);
+
+	return result;
+}
+
+
+//
+// MXErrno
+//
+
+MXErrno::MXErrno() :
+	m_errno(errno)
+{
+	// do nothing
+}
+
+MXErrno::MXErrno(int err) :
+	m_errno(err)
+{
+	// do nothing
+}
+
+int
+MXErrno::getErrno() const
+{
+	return m_errno;
+}
+
+const char*
+MXErrno::getErrstr() const
+{
+	return strerror(m_errno);
+}