Fix segfault in mysql/pg plugins. closes #76.
Don't run test if mysql/pg aren't configured. #76
#104: -? as --help alias(also for tarancheck), -v -> -V, += number/string in description (need to patch gopt_help += 9 symbols)
Merge branch 'stable' of github.com:tarantool/tarantool into stable
Merge branch 'gh-104-tarantool-args' into stable
Update test results (gh-104).
Merge branch 'stable'

Conflicts:
	client/tarantool/tc_opt.c