For #189.
* NEWS: Update.
* bin/autfilt.cc: Replace stopwatch with process_timer.
* bin/dstar2tgba.cc: Replace stopwatch with process_timer.
* bin/ltl2tgba.cc: Replace stopwatch with process_timer.
* bin/ltlcross.cc: Replace stopwatch with process_timer.
* bin/ltldo.cc: Replace stopwatch with process_timer.
* bin/randaut.cc: Replace stopwatch with process_timer.
* bin/common_aoutput.hh: Implement process_timer, integrate it.
* bin/common_aoutput.cc: Integrate process_timer and implement new
print method.
* spot/misc/timer.hh: Modify timer class and timeinfo struct
i.e. add cutime (children_utime) and cstime (children_stime).
* spot/misc/timer.cc: Help code to behave as before all this.
* spot/twaalgos/dtbasat.cc: Help print_log to behave as before
all this.
* spot/twaalgos/dtwasat.cc: Help print_log to behave as before
all this.
* spot/misc/formater.hh: Add operator<< for spot::timer.
Fixes#142, reported by Joachim Klein.
* bin/autfilt.cc, bin/ltlfilt.cc, bin/randaut.cc, bin/randltl.cc: Make
sure all global variables that have a destructor are destructed in the
main. Otherwise they risk being destructed after the library's global
structures are destructed, causing access to freed memory.
* NEWS: Mention the bug.
This is so that we can have -d as an alias for --dot everywhere.
* bin/randaut.cc: Rename -d as -e.
* NEWS: Mention the change.
* doc/org/autfilt.org, doc/org/oaut.org, doc/org/randaut.org,
tests/core/parseaut.test, tests/core/readsave.test: Adjust.
