(some) original messages:

lexertk.hpp(1017): warning C4266: 'int
lexertk::token_inserter::insert(const lexertk::token &,const
lexertk::token &,const lexertk::token &,const lexertk::token &,const
lexertk::token &,lexertk::token &)': no override available for virtual
member function from base 'lexertk::token_inserter'; function is hidden 

lexertk.hpp(1317): warning C4266: 'bool lexertk::token_scanner::operator
()(const lexertk::token &,const lexertk::token &,const lexertk::token
&,const lexertk::token &)': no override available for virtual member
function from base 'lexertk::token_scanner'; function is hidden

Here size_t variable converted into unsigned short - windows complains.
Original message:

RDFDisplay.cxx(96): warning C4267: '=': conversion from 'size_t' to
'_Ty', possible loss of data 

RDFDisplay.cxx(117): warning C4267: '=': conversion from 'size_t' to
'_Ty', possible loss of data

Original messages (all the same):
warning C4267: 'argument': conversion from 'size_t' to 'Font_t',
possible loss of data 

Original message:
TCling.cxx(7182): warning C4805: '==': unsafe mix of type 'int' and type
'bool' in operation 

Fixes warning from Travis:
```
include/TUrl.h:59:4: note: Calling default constructor for
'\''TObject'\''
   TUrl() : fUrl(), fProtocol(), fUser(), fPasswd(), fHost(), fFile(),
```   

Also use nullptr instead 0 where it makes sense

This is more strict declaration, problems faster detected by compiler

The integral of the crystal ball shape might vanish quickly due to
a finite precision when integrating far from the centre.
This leads to divisions by zero.
Now, a very small value is returned.

When TFoam is pre-sampling a phase space, it may divide by zero if for
some reason the event weight being generated is zero. This stops the generator
loop, and leads to a fp exception when enabled.
With this fix, the loop is kept running until the desired number of events
has been generated.

Most of user-defined ui5 panles will use "currentdir" as location of
XML/JS/JSON files. To effectively control browser cache, 
client version should be used here as well

When specified, all kind of JS scripts and ui5 files will be loaded from
URL path, which includes such version tag. Therefore when version is
changed, all related scripts will be automatically reloaded. 

This helps to solve browser cache problem of browser, especially for
development phase. Normally browser heavily uses cached files, but if
one changes any files, one should explain every user that he/she must
clean it cache. With provided solution no any user intervension are
required.

Up to now was used in internal ROOT methods, but now can be reused 
to modify already prepared http reply in RWebWindow

Page normally read from file system, but could be modified depending on
special WSHandler functionality. Will be used in RWebWindow

Deprecate old signature, but keep support for a while

Otherwise it can not be correctly override in derived classes

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.