This property was renamed in CMake 2.8.12, so we now should use
the newer name on recent CMake versions. We don't need to support
the pre-2.8.12 versions of CMake because we anyway have code
that requires 3.x.

This is important on slow platforms, like ARM, where this test
takes too long and times out:

http://cdash.cern.ch/viewTest.php?onlyfailed&buildid=376871

Fix ROOT-8918 in master.

The member fCanLoadClassInfo is used to check if the class info
is available and/or is loaded. If it is already available at
initialization, then there is no reason to call LoadClassInfo().

See section "Practical considerations using floating point arithmetic"
from link below for some considerations about why this is a good choice.

   https://en.wikipedia.org/wiki/Numerical_differentiation

When x and y are both small, the relative error can become artificially
large, and it makes more sense to use the absolute error instead. This
is especially true for comparisons that have large fluctuations due to
truncation and rounding errors, like numerical derivatives.

Signed-off-by: Vassil Vassilev <vvasilev@cern.ch>

This is aesthetically bad, and makes it hard to set break points to
specific parts of the code when debugging.

Avoids warnings like the ones below by rootcling:

Warning: Template parameter pack found: autoload of variadic templates is not supported yet.
Warning: Problems with arguments for forward declaration of class THist.

Reference on CDash: http://cdash.cern.ch/viewBuildError.php?type=1&buildid=375697

The variable is only needed if the #ifdef blocks are enabled,
better to avoid using the variable altogether, since it's just
saving a return value in any case.

* Add overtrain check to output of EvaluateAllMethods

* Adds 1v1 roc curves to the tmva multiclass gui

* Add tests for TMVA roc curves.

* Forgot header

* clang-format fix

* Add licence to files missing it

Later should be done per http server instance

Method implemented in TMenuItems class and can be used for any object,
which has TClass 

Only this class requires checked state, base class - not

It is collection of menu items, which is created by request from the
client. Now just used to make JSON code, later will be preserved until
item execution is performed.

* Reintroduce free function constructor

Should fix BinnedFitExecPolicy test errors

* Actually fail if the test result is wrong

* Remove dumb ifdef guard

One cannout put webpage class fully into source code while
Qt need to generate MOC file (Qt dictionary) for class slots and signals

Probably, this qmake project can be replaced with cmake logic