Mark3 RTOS Source

Adding some stubs for example code I plan to write soon

Cleaning up a little documentation.

-- Adding support for unit-test framework to support both idle-func and idle-thread mode
-- Updating arduino config file to support idle-func mode

-Fixed a bug in the invocation of Kernel::IdleFunc() on atmega328p
-Created a FakeThread struct to shave unnecessary RAM usage when KERNEL_USE_IDLE_FUNC set
-Added compile-time defines to markade2 demo to use and Idle function instead of an Idle Thread if supported.

Fixing a Thread Timer/Timeout macro name mixup

--Adding preliminary support for an idle-hook context, allowing the kernel to run without requiring a dedicated idle thread. This is long overdue.
--Support for mega328p only at the moment, and disabled by default. Definitely room for optimization.

- Breaking timerlist into separate timer/timerscheduler/timerlist modules
- removing underscores from filenames in kernel for consistency
- renaming kprofile to kernelprofile for consistency
- Adding mark3.h, which wraps all kernel objects/APIs with a single include
- Refactoring Arduino support so that importing the Mark3 lib results in only "mark3.h" being included, instead of every kernel header

-Cleaning up a bunch of doxygen warnings in the kernel code
-Taking middleware out of the main docs. It's way too much for one volume; will create volumes for middleware code later.

flAVR doesn't support EEPROM operations quite yet -- switching high-score mechanism in Super Brick Break to use RAM for high-scores until then.

--Adding kernel-aware simulator joystick driver
--Adding kernel-aware API to allow the application to detect that it's being simulated by a kernel-aware simulator
--Simplifying bitmap API to avoid colorspace conversion for speed/size.
--Updating Super Brick-Breaker example to use mark3 kernel-aware joystick plugin