Finished FPU support for Cortex-M4

main.cpp

miosix/arch/arm7_lpc2000/common/arch_settings.h

miosix/arch/cortexM3_stm32/common/arch_settings.h

miosix/arch/cortexM3_stm32f2/common/arch_settings.h

miosix/arch/cortexM3_stm32l1/common/arch_settings.h

miosix/arch/cortexM4_stm32f4/common/arch_settings.h

...h/cortexM4_stm32f4/common/interfaces-impl/portability.cpp

...ortexM4_stm32f4/common/interfaces-impl/portability_impl.h

miosix/config/Makefile.inc

miosix/config/miosix_settings.h

miosix/doc/textdoc/Changelog.txt

miosix/kernel/kernel.cpp

miosix/kernel/sync.h

miosix/testsuite/testsuite.cpp