[svn-r22105] Description:

Bring r20557:22085 from trunk to this branch, also fixing some other
issues/failures in the branch simultaneously.  The h5repack tests are still
failing, but Neil will be checking into those, so the branch can be fully
functional again.

Tested on:
	Mac OSX/64 10.7.3 (amazon) w/debug

tools/testfiles/tpbitsCompound.ddl

@@ -0,0 +1,66 @@
+HDF5 "tcompound.h5" {
+DATASET "/dset1" {
+   DATATYPE  H5T_COMPOUND {
+      H5T_STD_I32BE "a_name";
+      H5T_IEEE_F32BE "b_name";
+      H5T_IEEE_F64BE "c_name";
+   }
+   DATASPACE  SIMPLE { ( 5 ) / ( 5 ) }
+   PACKED_BITS OFFSET=0 LENGTH=1
+   DATA {
+   (0): {
+         0,
+         0,
+         1
+      },
+   (1): {
+         1,
+         1,
+         0.5
+      },
+   (2): {
+         0,
+         4,
+         0.333333
+      },
+   (3): {
+         1,
+         9,
+         0.25
+      },
+   (4): {
+         0,
+         16,
+         0.2
+      }
+   }
+   PACKED_BITS OFFSET=1 LENGTH=1
+   DATA {
+   (0): {
+         0,
+         0,
+         1
+      },
+   (1): {
+         0,
+         1,
+         0.5
+      },
+   (2): {
+         1,
+         4,
+         0.333333
+      },
+   (3): {
+         1,
+         9,
+         0.25
+      },
+   (4): {
+         0,
+         16,
+         0.2
+      }
+   }
+}
+}