Changes:
- do not use empty-state if warn/crit conditions contain check on 'count'
- check_memory: distinguish between committed and swap memory
- check_memory: change default type on linux to physical,swap
- fix evaluating nested filter conditions
- fix check_drivesize missing performance data when using free_bytes threshold (#136)
- fix check_http/check_tcp/check_dns help (#135)
- fix using condition alias on nested filters
- fix check_tasksched memory leak (#122)
- update windows exporter to 0.28.1