Move all definitions and instantiations out of the header file.
Reuse the single task definition that was already defined.

Also only define 3 instances of each type, as this is all that
the test actually uses (no need for 20).

This adds support for vxworks7 with its minor differences from vxworks6.

Includes compatibility wrappers for the old header names.

Refactors inclusions in all OSAL source files to only include
the components they actually use/refer to.

Refactor all inclusion guards to follow the same general
format (uppercase filename, no leading/trailing underscore)

Removes the signal mask updates from the POSIX global lock (not needed).
Adds a condition variable to the structure, which can be used to
directly wake up a waiting task rather than requiring that task to poll
the global state.

Fix #410, breakup includes

Add macros for configurable behavior of argument bug checking.

- BUGCHECK for checking argument values which should never happen
   and indicate bugs if they do.
- ARGCHECK for checking argument values which may happen and can
   be mitigated if they do.

The behavior of BUGCHECK is influenced by two new OSAL config
options, which can disable it completely or make it strict/enforcing
such that it will abort() for debugging if a condition is not met.

Use the new macros to validate arguments to OS API calls.

Also includes coverage test updates, which revealed some
areas where return types were not consistent, and the macro
makes them consistent now.

Fix #670, clean up task definitions in core test

Fix #697, Fix formatting

Fix #673 and #677, update global locks

Fix #686, Use errno in clock_getres error reporting

Fix #679, Add Markdown version of OSAL Configuration Guide

Fix #569, Check and report sysconf error return

Fix #542, Avoid UT failure if SEM_VALUE_MAX >= UINT32_MAX

Fix #377, Add "OSAL Select" functional tests

Fix #688, implement value check and bug report macros

Fix #610, Add vxworks7 support