added courtesy_sleep()
lhashtable: print filename
memory allocator, ribs_malloc, ribs_free
added dep on ribs2 lib
moved ribs_freeall to context
ribify.c ribs_* ==> _ribified_*

in order to avoid naming conflict
ribify.h removed -- not needed
added ribs_*sleep() facility
moved malloc, support ribified realloc
sprintf, strdup, memdup in ribs malloc
thumb2 instruction set
tiny framework for timer
shorter way to specify syms to ribify
added missing license
removed courtesy_sleep(), use ribs_sleep() instead