Don't hardcode the data paths, use the info from configure.

--- vamos/vamos.cc
+++ vamos/vamos.cc
@@ -143,7 +143,7 @@
     if (check)
       return path;
   }
-  path = "/usr/local/share/vamos/" + section + "/" + file + ".xml";
+  path = DATADIR "/" + section + "/" + file + ".xml";
   {
     std::ifstream check (path.c_str ());
     if (check)
@@ -202,7 +202,7 @@
 
       // How I can I get this automatically set to the configured data
       // directory?
-      data_dir = "/usr/local/share/vamos/";
+      data_dir = DATADIR "/";
       try
         {
           Texture_Image test_tex (data_dir + "textures/wall.png");
@@ -210,7 +210,7 @@
       catch (Missing_Texture_File)
         {
           std::cerr << "Couldn't find the data direcory  ../data, or "
-                    << "/usr/local/share/vamos/."
+                    << DATADIR "/."
                     << std::endl;
           std::exit (EXIT_FAILURE);
         }
--- vamos/Makefile.in
+++ vamos/Makefile.in
@@ -154,7 +154,7 @@
 	`pkg-config --cflags sigc++-1.2`
 
 
-AM_CXXFLAGS = -Wall -pedantic -O1 -g -gstabs+
+AM_CXXFLAGS = -Wall -pedantic -O1 -g -gstabs+ -DDATADIR=\"$(pkgdatadir)\"
 subdir = vamos
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 mkinstalldirs = $(SHELL) $(top_srcdir)/config/mkinstalldirs