Improve performace of reading a vector of non-class type by 25% (i.e. std::vector<int>).
The code to apply the same improvement to other container type is in place but is not
enabled yet as the 'better' solution avoid creating a temporary array to read in the
value via Read[Fast]Array, however the avoid the call to Read[Fast]Array breaks
the XML streaming (which uses Read[Fast]Array to insert the <Array> tag around the
element).  See for example VectorLooper::ReadCollectionBool ...


git-svn-id: https://root.cern.ch/svn/root/branches/v5-34-00-patches@48921 27541ba8-7e3a-0410-8455-c3a389f83636