R*tree implementation based on boost::variant

svn path=; revision=70531
other version of split algorithm + a lot of minor changes

svn path=; revision=70607
overlap error patch + minor changes

svn path=; revision=70627
rtree Box template parameter removed

svn path=; revision=70689
namespaces hierarchy changed

svn path=; revision=70701
tagstags are now in the index namespace

svn path=; revision=70702
choose_next_node algorithm changed

svn path=; revision=70746
reinsert implemented

svn path=; revision=70964
reinsertions disabled + minor changes

svn path=; revision=71544
new creation algorithm added

svn path=; revision=71634
rtree::find parameters changed

svn path=; revision=71640
operator| moved to namespace index

svn path=; revision=71642
insert algorithm divided to tag dispatched parts

svn path=; revision=71658
searching time tests related code added

svn path=; revision=71664
remove algorithm added + some other changes

svn path=; revision=71726
quadratic split algorithm added, error in linear split corrected

svn path=; revision=71755
quadratic split error corrected

svn path=; revision=71763
corrected: gcc compile errors, wrong assert in remove; + minor changes

svn path=; revision=71764
cleanup

svn path=; revision=71775
rstar partially implemented

svn path=; revision=71880