h5edit

New feature: Added edit command RENAME. This one accepts the syntax of
RENAME <object> <old attribute> <new attribute>.  It does not accept
the combined <object>/<old attribute> yet.

test/testfiles/rename-atts12-grrt.edit:
test/testfiles/rename-atts12-dset111.edit:
test/testfiles/rename-atts12-grrt.ref:
test/testfiles/rename-atts12-dset111.ref:
test/testh5edit.sh:

src/parse.y:
src/analyze.c:
src/parse.c:
src/analyze.l:
src/parse.h:
src/h5edit.h:
    Add command parsing for RENAME.
src/rename_copy_cmd.c:
    Add rename_attribute().
src/Makefile.am:
src/Makefile.in:
    Add rename_copy_cmd.c to h5edit object file list.

Tested: Linux (jam), Linux 64 (koala), SunOS 5.10 (linew),
Linux ppc64 (ostrich), Mac OSX lion (duck), mountain lion (owl).