apps/examples/pdcurses:  Add a very simple example that just shows the entire character set (7-bit only).  It adapts to the size of the framebuffer and, hence, can be used with very tiny displays.  In fact it looks really dumb on big displays.

apps/example/fb:  Restores 0205eeef.  It was correct all along.  Also fixes calculation of the end byte position.

apps/graphics/pdcurs34: When clearing screen, width calculation should round up for any fractional bytes.  When pdcurses is closed, forgot to close the djoystick driver.

This reverts commit 0205eeef.

apps/graphics/pdcurs34:  Correct logic that clears the screen.  For the casee of BPP < 8, it was writing beyond the end of the framebuffer and clobbering things.

i8sak: Adds ability to get/set rxonidle setting for MAC layer

Approved-by: Gregory Nutt <gnutt@nuttx.org>

i8shark: Adds CONFIG_IEEE802154_I8SHARK_XBEE_APPHDR option to remove XBee's application header before sending to Wireshark. This option will corrupt any traffic received that does not include this application header.

Approved-by: Gregory Nutt <gnutt@nuttx.org>

apps/graphics/pdcurs34:  Monochrome/greylevel framebuffer support is now code complete, but untested.  Also added support for Y2 and Y2 color formats.

apps/graphics/pdcurses:  Add support for discrete joystick input.  This is sufficient to get through all menuing tests that do not require text input.

apps/pdcurses/: Fix a few more bugs found in testing; apps/examples/pdcurses:  Brings in the remaining pdcurses demo programs.

    apps/graphics/pdcur34:  Various fixes from initial testing.  Still does not work

    apps/graphics/pdcurs34/nuttx:  Completes first cut at framebuffer rendering logic.

apps/graphics/pdcurs34:  Add NuttX framebuffer color managment and beginning of some rendering logic.

apps/examples/pdcurses:  Bring pdcurses demos and make them conform to the NuttX coding style (not yet hooked into the build system).

apps/graphics/pdcurses: Add dummy files with placeholders for the logic that needs to be implemented to integrated pdcurses with NuttX.

apps/graphics/pdcurs34:  This commit brings the basic public domain pdcurses library into NuttX.  This library is complete but not yet usuable because it still requires the NuttX interfacing code needed hook pdcurses into the NuttX graphics drivers.  Also test cases are needed to verify the pdcurses integration.

apps/nshlib:  Big simplification of last change.  /proc/kmm, umm, and progmem have been replaced with a single procfs file called /proc/meminfo.  The NSH free command now degenerates to a simple dump of /proc/meminfo.

apps/nshlib:  The free commands no longer used mallinfo() to get the state of the use heap.  Two reasons:  That is not useful information in the kernel build.  And (2) there are other memory resources of interest in other configurations such as the Kernel heap in PROTECTED and KERNEL builds, and the prog mem uses when FLASH is used to hold modifiable data.  The free command has been extended to just dump the content of procfs entries and to include all of these other memory resources of the procfs entries are available.