Add a tool to auto-generated documentation of NuttX configuration variables (still a work in progress)

Fix major misthink in Cortex-M0 port:  The Cortex-M0 has no BASEPRI register.  We have to revert to using the nasty PRIMASK register

Convert olimex-lpc17stk configuration to use the kconfig-frontends tools; Fix some compile errors in the pl2303 USB device driver

Fixes to the LM4F clock configuration.  Errors in register handling caused everything to run at half speed

LPC17xx GPIO interrupt fixes: lpc17_setintedge() must be atomic.  Can't disable interrupts from interrupt handlers because they are automatically re-enabled.  Try re-configuring pin instead.

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More naming changes associated with earlier renaming of LP17xx up_spiinitialize; LPC178x SSP support; Open1788 SSP and touchscreen support

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LPC17xx SPI and SSP initialization functions both called up_spiinitialize();  Changed to lpc17_spinitialize() and lpc17_sspinitialize().

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binfmt_execmodule() calls to sched_releasttcb() was not updated to use the second, thread type parameter

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In the kernel build, allocate the stacks for kernel threads from the kernel heap so that they are protected from medddling by the applications

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Fix a FAT error when trying to create file in a non-existent directory. Reported by Andrew Tridgell.

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Directories where the same source files are used to build different objects need to keep those objects in separate directories; LPC17xx updates from Chris Taglia

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