[*] report JSON parsing errors and other C++ exception instead of cra…

…shing

[*] use C++ header name for stdlib

[*] make application source code relocatable

[*] make application source code relocatable

[*] small cleanup of .gitignore file

[*] make sure in cmake that all linked libraries will be found at run…

…time too

[*] send IDR frame when new RTSP client connects

[*] update to MRTech IFF SDK version 1.2

including HTTP control interface