Keep flash setting when generate Keil MDK project.
Merge branch 'master' of https://github.com/RT-Thread/rt-thread
Fix the memheap_realloc issue
rtdef.h: get back the codes that removed accidentally by d80a471
rm48x50: remove useless reg_test code
Merge pull request #99 from grissiom/rm48x50

Rm48x50 updates
clean up code: remove the old file.