9.3 compatibility, though not complete yet

Missing: ERROR:  could not load library "/usr/lib/postgresql/9.3/lib/pljava.so": /usr/lib/postgresql/9.3/lib/pljava.so: undefined symbol: disable_sig_alarm

--- a/src/C/pljava/type/AclId.c
+++ b/src/C/pljava/type/AclId.c
@@ -12,6 +12,9 @@
 #if (PGSQL_MAJOR_VER == 8 && PGSQL_MINOR_VER < 1)
 #include <utils/lsyscache.h>
 #endif
+#if (PG_VERSION_NUM >= 90300)
+#include "access/htup_details.h"
+#endif
 #include "pljava/type/AclId.h"
 #include "pljava/type/Oid.h"
 #include "pljava/type/String.h"
--- a/src/C/pljava/type/HeapTupleHeader.c
+++ b/src/C/pljava/type/HeapTupleHeader.c
@@ -12,6 +12,9 @@
 #include <executor/executor.h>
 #include <executor/spi.h>
 #include <utils/typcache.h>
+#if (PG_VERSION_NUM >= 90300)
+#include "access/htup_details.h"
+#endif
 
 #include "pljava/Exception.h"
 #include "pljava/Invocation.h"
