stop failure to get commit id when in a git repository but not on
a tagged branch (fd 5 was non-existent).  Not tested with a tagged
branch.
add simple memory performance test
add memory write speed test.
add context switching speed test to "test memory" command.
allow setting of % of 252 byte RS protected packets that we want
to have delivered.  Adjust tests accordingly.  Create new test
for ~50% packet delivery on fakeradio in preparation for network
coding.
fixes and improvements to handling of git repo with no tags on branch.
minor tweaks to bash compatibility fixes.
Fix compiler warning
Merge branch 'meshextender' into 'development'