provide symbolic values for different styles as suggested here:
https://sft.its.cern.ch/jira/browse/ROOT-4910
TAttFill
Protection added in UnZoom
Fix https://sft.its.cern.ch/jira/browse/ROOT-4516
The option "A" in the `Draw()` was not cleaning properly the current pad.
Started working on integrating IgProf in PROOF
PROOF: tag identifying additional logfiles

Tags are now used for the Valgrind and IgProf wrappers, generating
additional logfiles. They are appended to the "ordinal" number both for
the master line and the workers lines. Appending tags to ordinals also
incidentally fixes a bug leading to having the additional logfile
concatenated to the ordinary logfile while getting the first.
Fixed PROOF pct of completion when getting logs
No newline in PROOF logfiles retrieval progress
Added PROOF logfiles preprocessing before sending
Added quotes for igprof cmd in PROOF-Lite
PROOF GUI support for log filtering via pipe cmd
Some debug in PROOF log retrieval
PROOF: automatic igprof-analyse for IgProf pp logs
No bloating IgProf output and clearer profile type

Now the tag to invoke IgProf performance profiling is "igprof-pp" and
no longer "igprof" alone. Leaves some space for adding IgProf memory
profiling.
Add missing variable definition
Add missing forward declaration
Make shouldProceed C++ function.
Try to handle exceptions coming from the JIT.

The idea is whenever there is an exception cling to be able to recover from it
and continue working. For example:
[cling] throw 12;
shouldn't crash the current session in the interpreter. Now that we have compiled
the UserInterface with exceptions on, I hoped to be able to catch exceptions
coming from the JIT easily, but obviously I am still missing something.
The standard said use catch(...) and not catch()
Move the handling of unhandled exceptions in the loop.

Indeed if the UserInterface.cpp is compiled without -fno-exceptions I get:
****************** CLING ******************
* Type C++ code and press enter to run it *
*             Type .q to exit             *
*******************************************
[cling]$ throw 12;
Exception occurred. Recovering...
[cling]$ .q

So the issue is still in the build system, because I built UserInterface.cpp 'by hand'.