Remove all configuration variable documentation from configs/README.txt and Docuemntation/NuttXPortingGuidle.html.  The current NuttX configuration is documented in Kconfig files and in Documentation/NuttXSonfigVariables.html.  The older configuration variable documentation is not being maintained and, hence, is a liability

ARMv7-A: If the page table does not like in same address range as .text and primary RAM, then we will need to set up an additional mapping for the page table at boot time.

procfs now shows information about the group that each thread belongs:  Like parents, group member, open file, and open sockets

NxConsole: Fix typo that caused compile error when CONFIG_NXCONSOLE_BPP is less than 8.  From Librae

Create procfs_utils.c; File missed from last commit; + remove warning from mm_memalign.c (how did this work before?)

Move sleep() and usleep() from sched/ to libc/unistd/.  These functions now are simple wrappers for nanosleep().  Remove sleep() and usleep() from system calls; add nanosleep() to system calls