fix errors. create rec dir on startRecord with time for multiple recs on same day with same cam. also writeout stats along with rec.

save timestamp as ms (not ns), format time: only show h/m when dur long enough, _rec->showProgress() to add to camInfo, solved nasty auto keyword segfault bug, make progressbar smaller [40 digits]

[crash after rec] add printfeatures to cam and stream. pingscan: add better alternative to finding cam via mac

[wip] extract record class from cam. checkdisk functions (utils and record): available,estimated, used. utils fps and framesize fixed constants for now.

[not tested] progressbar for recordings: add functions to iprinter to print progressbar, get width from console and calc chars, get times and format mm:ss.

more threadpool rewrite, change info to printcaminfo because of name collisiong with iprinter::info, added iprinter print overloads, limit opencv threads to 1

speedup: 	use threadpool and sublass frameprocessor from qrunnable -> reuse thread and frameprocessor objects for recording

change conf.json to include outdir,recordduratiodefault and put cams in array, parse, add outdir func for each cam > construct dir if it doesnt exist, add cam ctor

 search for file ending with json/xml in appdir and use as default if no settings/config is specified as arg

proper exit on error, utils ns, utils global bool running to sync threads, use qapp->exit, NOTE: blocking console on unplanned app termination > user needs to press once more

WIP/crashes add load and saveSettings functions to cam class (+signals,slots,console,core,utils) + read settings name as cmdline arg

loadSettings - if cam is open and settings file exists, load settings from file to current cam
saveSettings - if cam is open, writeout/save settings from current cam to xml file

changed cam to read from config file. changed cam state. made more robust. add detectCam. fixed regression bugs to get cams working againfinetuned listcams,dcetrect,startuo,shutdown...

add camobserver stateChanged fun -> cam: toggleopenclosestate, connect signals, core: updateCamstate - find cam and call cam->toggleopenclosestate

connect signals/slots in iPrinter ctor level. use Console singleton, use conditional compilation for console