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add  #pragma link C++ global ROOT_TMath as suggested by Philippe. This avoids via the header guard to re-include the definition of TMath.h when running in CINT. 
This fixes a crash observed running stressFit.cxx in interpreted mode


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Introducing a parallel unzipping algorithm for pre-fetched buffers. Since we already know what buffers are going to be read, we can decompress a few of them in advance in an additional thread and give the impression that the data decompression comes for free (we gain up to 30% in reading intensive jobs).

The size of this unzipping cache is 20% the size of the TTreeCache and can be modified with TTreeCache::SetUnzipBufferSize(Long64_t bufferSize). Theoretically, we only need one buffer in advance but in practice we might fall short if the unzipping cache is too small (synchronization costs).

This experimental feature is disabled by default, to activate it use the static function TTreeCache::SetParallelUnzip(TTreeCacheUnzip::EParUnzipMode option = TTreeCacheUnzip::kEnable). The possible values to pass are: TTreeCacheUnzip::kEnable to enable it,TTreeCacheUnzip::kDisable to disable it and TTreeCacheUnzip::kForce to force it. Since it will only work if you have more than one core, the TTreeCacheUnzip::kForce option is useful to run it even if you have only one cpu (to measure the overhead, for example).


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TPRegexp
========

1. Modularized Match() and Substitute() functions so that the low-level work
   is done by MatchInternal() and SubstituteInternal().

2. Added function TString GetModifiers() that translates from bit-flag
   options back to perl-style option characters.

3. For all functions that do actual matching replaced the default value
   of 'Int_t nMatchMax' argument from 30 to 10. PCRE internals require
   the index buffer to be 3-times the number of allowed matches. This
   multiplication is now performed in individual functions and nMatchMax
   is really the number of allowed matches. Two function calls in 
   TString passing this number explicitly have been updated.

TPMERegexp
==========

New sub-class of TPRegexp with API closer to PERL.
Supports main Perl operations using regular expressions (Match,
Substitute and Split). To retrieve the results one can simply use
operator[] returning a TString.

tutorials/regexp_pme.C
======================

Tutorial showing usage of the TPMERegexp class.


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