recompile if the generated abc file is for a 32 bit processor on a 64 bit computer or for a 64 bit processor on a 32 bit computer

add -con for windows, disables waiting for a key press at the end of a program that prints something, ignored on other platforms

bug fix, fix generated options file for 32 bit windows, fix strlen call in linker command size overflow test, add patching CLEANPATH,CLEANLIB and CLEANILIB using patchbin on windows, add patchbin and -O and -s to windows makefiles, prevent some c compiler warnings

add license

See merge request !21

Add flag for turning generic fusion on/off

See merge request !17

always write modification time to prevent re-compilation by cpm

See merge request !18

Fix previous commit: ignore libraries starting with -l on Windows

See merge request !16

Add support for .implib on Windows

See merge request !15

Quote arguments with mingw

See merge request !14

Imported libraries are collected as object files, because they need to
be found in Clean System Files in the same way. In the link step
(`add_imported_object_files`) we check if the dependency is a normal
object file or a library, and prepend `-l` if it is a library.

Library names starting with `-l` are still ignored so that you can use
`import code from library "-lmysql"` and `import code from library
"mysql_library"` in the same implementation module and compile for POSIX
and Windows.

Do not add quotes around arguments for CreateProcess when QUOTE_SPAWN_ARGUMENTS is set (these are already added elsewhere)

Don't redirect compiler stderr to stdout on Windows

See merge request !13

It is not clear to me why this would be useful, except a slight
performance enhancement because you need one less thread. This causes a
problem in `testproperties`, which calls `clm` and passes stdout and
stderr through. When `testproperties` is called by `cleantest`,
`cleantest` expects only JSON test events on stdout, while stderr may be
used for warnings. So if the compiler warnings are all on stderr and clm
provides no extra output on stdout (as is the case after this commit),
the `cleantest` user will get information about compilation
errors/warnings while the tests continue to work.

Fix quoting of imported object files in calls to spawn

See merge request !12

Warn when the linker command line exceeds 32767 characters on Windows; add terminating NULL character

Use mkdir with one argument only in Microsoft C / MinGW

See merge request !11

Windows fixes

See merge request !10