Update the test_mercury script.

tools/test_mercury:
    Build the source distribution in the hlc.gc.pregen grade.

    Force the LLDS base grade for the source distribution to be none
    rather than asm_fast.  The latter was causing problems when
    generating the C files on Mac OS X (or anything else on which
    asm_fast doesn't work).
Add news about data representation and float boxing changes for 13.05.

NEWS:
	As above.
Documentation clarifications for map and bimap folds.

library/bimap.m:
	Specify that foldl over a bimap is done by inorder traversal
	by key.

library/map.m:
	Likewise for foldl_values and map_foldl.
Update some documentation.

.INSTALL.in:
	Binaries for GCC and friends are also included with MinGW.

README.ThreadScope:
	We don't require a separate copy of the project (and Paul's)
	contact details here.
Update more web and email addresses.

LIMITATIONS:
doc/mercury.info.in:
	As above.
Update REAMDE.MS-VisualC:

README.MS-VisualC:
    Mercury has been ported to 64-bit Windows, just not when
    using MSVC as a C compiler.
More documentation updates.

.README.in:
	The contents of java/runtime come under the LGPL as well.

	Minor rewording.

README.MS-Windows:
	We don't need to list every version of Windows we no longer
	actively support.  (If the version is not on the list of those
	we *do* support, then we don't support it.)

README.MacOS:
	We will never support compiling Mercury with llvm-gcc on
	Mac OS X 10.5 and 10.6.
Update more web links

README.bootstrap:
    As above.
Fix compilation warnings in benchmarks.

benchmarks/progs/compress/bmio.m:
benchmarks/progs/mandelbrot/mandelbrot.m:
	As above.

benchmarks/progs/compress/*.m:
	Update syntax used in these files: there are no
	changes to any algorithms.
Improve style of Prolog interpreter example.

samples/interpreter.m:
	Use io.format/4 is better style than using a sequence
	of calls to io.write_{string,int}.
Fix a problem on Cygwin.

library/float.m:
    The 64-bit integer type on Cygwin is "long long int".
Address review comments.

library/bimap.m:
	Address review comments from Peter Wang.
Clean C files in mfilterjavac/

configure.ac:
    Add mfilterjavac to the list of directories to test for incompatble
    pre-generated C files.