Keep the entire argc/argv from the shell.  Do not prune the command
name as getopt expects this to be there.

Add a position independent code (PIC) variant of the ut_assert library,
which can be dynamically loaded into other applications rather than running
as a standalone OSAL application.  This enables loading UT assert as a
CFE library.

This required moving some symbols/functions around.  Mainly, the PIC
library does _not_ contain the "utbsp.c" file which has the bindings
to the OSAL BSP when running as a standalone app, but everything else
should be the same.

Resolve inconsistency in how the stack size is treated across
different OS implemntations.  POSIX would enforce a minimum,
where RTEMS would not.

With this change the user requested size is passed through
to the underlying OS exactly as is, no enforced minimum.

An additional sanity check is added at the shared layer to
ensure that the stack size is never passed as 0.

Add requisite cast to printf.
Also use sizeof() rather than hardcoded size of 12.

The pthread API defines the timeout parameter for
the pthread_mutex_timedlock call as an absolute value
based on CLOCK_REALTIME.

This introduces a wrapper function to calculate the absolute
timeout for this.

Fix #499, store all arguments in generic-linux BSP

Fix #501, add PIC library for ut assert

Fix #516, Use absolute timeout for timedlock calls

Fix #505, warnings in time base API test

Fix #506, enforce nonzero stack size

Fix #520, Update license and README for Apache 2.0, also updated quickstart