The last change added .PRECIOUS: $(BIN) to everyway Makefile in hopes the libapps.a will not be deleted on Control-C (unproven so far).  However, $(BIN) may contain back slashes in some build platforms and that causes problems for make:  It can't handle the backslashes in the .PRECIOUS dependency list.  $(BIN) replaced with ../../libapp.a, where the number of ../ depends on the depth of the Makefile in the apps/ source tree.

All Makefiles:  Add .PRECIOUS: apps/libapps.a to every Makefile.  Hopefully this will end awkward problems when you Control-C out of a build and libapps.a is deleted.

Application.mk:  Add the .PRECIOUS target to prevent libapps.a from being deleted when the make is interrupted.

Changes to many Makefiles.  For kernel buil object containing main cannot go into library because of name collisions.  The object file must be handled as a special case in every Makefile

Customize the program name in the generic setup that was added to each makefile that installs a program

Add an install target to all makefiles.  For the import build, the top-level Makefile now does two passes: (1) builds libapp.a, then (2) installs the programs (not yet finished)

Add apps/examples/slcd, Remove USB from STM32L-Discovery, LSE support for the STM32 L family, some STM32L-Discovery LCD debug changes

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