Standardize directory names

Reorganized.  Created a new top level include directory that will hold all of Trick's header files. Moved all of the Trick headers to this directory.  Created a libexec directory that holds all of the executables that users don't need to execute directly.  Changed all of the executables remaining in bin to start with "trick-".  In the sim_services directories changed all source files to find the Trick headers in their new location.  Since all of the include files are gone in sim_services, removed the src directories as well, moving all of the source files up a level.  Moved the makefiles, docs, man, and other architecture independent files into a top level share directory.  Renamed lib_${TRICK_HOST_CPU} to lib64 or lib depending on the platform we're currently on.

refs #63

trick_source/sim_services/VariableServer/VariableServerThread_write_stdio.cpp

@@ -0,0 +1,13 @@
+
+#include "trick/VariableServer.hh"
+#include "trick/variable_server_message_types.h"
+#include "trick/tc_proto.h"
+
+int Trick::VariableServerThread::write_stdio(int stream, std::string text) {
+
+    char header[16] ;
+    sprintf(header, "%-2d %1d %8d\n" , VS_STDIO, stream , (int)text.length()) ;
+    tc_write(&connection , (char *) header , strlen(header)) ;
+    tc_write(&connection , (char *) text.c_str() , text.length()) ;
+    return 0 ;
+}