SNClient

Changes:

- update windows exporter to 0.29.1
- wmi: always set en_US language in query (#156)
- check_eventlog: fix time offset parsing (#157)
- add /api/v1/inventory/{module} rest endpoint to get specific inventory
- add exporter to inventory list
- fix updates from custom urls
- add /api/v1/admin/updates/install endpoint to trigger update
- fix agent not starting if exporter_modules folder does not exist
- check_files: add version macro support for .exe/.dll files
- fix missing thresholds when using perf-syntax
- add check_ping plugin
- check_process: check default empty-state to critical

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

Changes:

- fix check_os_version windows build version (#134)
- update node exporter to 1.8.2
- chdir windows service into to shared-path folder
- fix escaping arguments in windows ps1 scripts
- fill unused $ARGx$ macros with empty space (#110)
- fix if/else expression evaluation (#126)