Add zero_start option to export + keep abs. start time in profile

Fix error checking in profcl_export_info() function
Add stream write error to list of known errors
Add stream write error to CLUtils to conform with CLProfiler
test_prof: Add queue so there arent event overlaps in same queue

test_prof: Remove spaces from event names (better for plotting
with gantt.py).
test_prof: Explicit use of new zero_start export option