Creates and updates primitive geometry with tracks, which regularly
updated in browser.

Now JSROOT.TGeoPainter can be used with THttpServer for "monitoring" of
geometry object. Exactly like a histogram, TGeoManager can be regularly
received and dsiplayed. Also tracks can be monitored together

This is necessary to avoid ROOT's installed cmake modules
to point to the build directory when using builtin GSL, since
$GSL_LIBRARIES is the full path to <BINARY_DIR>/lib/libgsl.so
when using builtin GSL.

As per comments from https://root-forum.cern.ch/t/early-error-checking-with-ttreereader/34886

Fix spelling

Newest qt 5.13.0 crashes here during exit.
Disable it, while is not clear if defaultProfile can be still used -
seems to be not

As usual, CEF changes API. Now try to check version and use
different function signatures.

Instead of guessing the golden underlying type, use std::underlying_type.

Plus other small fixes in geo and hist3d painters

Before they were hidden when fit result was not provided 

Support only normlaized coordiantes 
make it equivalent to size of subpad
Seems to be, text attributes not works up to now

Update copyright year to 2019

Firefox and Chrome are "native" brwosers for ROOT and fully supported.
Custom browser can be specified when starting root like: 
   root --web=opera
Now it should be possible properly use such browser to open RWebWindow
or just to show webpage with URL

Avoid as much as possible mixture of std::string and TString.
Only TString::Tokenize() still in use.

It shows provided Url in "normal" browser window

It indicates if started browser should run in "standalone" mode - 
isolated from all others browser instances. Firefox in this case
requires separate profile, Chrome uses --app mode to hide all
decorations. To show normal browser, such "standalone" mode has to be
disabled

* Cleanup RooDataHist and RooHistFunc. Specifically, remove iterator members
that create unnecessary state in the classes.
* Fix uninitialised values in RooSimGenContext.h.
* Remove useless members
* Replace legacy iterators by range-based for loops
* Improve const correctness